View source for Duke of Somerset

{{short description|English dukedom}}
{{Use British English|date=January 2022}}
{{Use dmy dates|date=January 2022}}
{{Infobox nobility title
| name              = Dukedom of Somerset 
| image             = [[File:Coronet of a British Duke.svg|150px]]<br/>[[File:Arms of Seymour Family.svg|180px]] 
| image_size        =  
| alt               =  
| caption           = Arms of Seymour: ''Quarterly: 1st and 4th, Or on a Pile Gules between six Fleurs-de-Lis Azure three Lions of England (being the Augmentation of Honour granted by King Henry VIII on his marriage with [[Jane Seymour]]);  2nd and 3rd, Gules two Wings joined in lure the tips downwards Or (Seymour)''
| creation_date     = 1443 <small>(first creation)</small><br/>1448 <small>(second creation)</small><br/>1499 <small>(third creation)</small><br/>1547 <small>(fourth creation)</small><br/>1660 <small>(fourth creation, restored)</small> 
| creation          =  
| monarch           = [[Henry VI of England|Henry VI]]<small> (first creation)</small><br/>[[Henry VI of England|Henry VI]] <small>(second creation)</small><br/>[[Henry VII of England|Henry VII]] <small>(third creation)</small><br/>[[Edward VI of England|Edward VI]] <small>(fourth creation)</small><br/>[[Charles II of England|Charles II]]<small> (fourth creation, restored)</small> 
| peerage           = [[Peerage of England]] 
| baronetage        =  
| first_holder      = [[John Beaufort, 1st Duke of Somerset|John Beaufort, 3rd Earl of Somerset]] 
| last_holder       =  
| present_holder    = [[John Seymour, 19th Duke of Somerset]] 
| heir_apparent     = Sebastian Seymour, Baron Seymour 
| heir_presumptive  =  
| remainder_to      = the 1st Duke's [[heirs male]] [[heirs of the body|of the body]] lawfully begotten 
| subsidiary_titles = Baron Seymour 
| status            =  
| extinction_date   = 1444 <small>(first creation)</small><br/>1464 <small>(second creation)</small><br/>1471 <small>(second creation, titular)</small><br/>1500 <small>(third creation forfeit)</small> 
| family_seat       = [[Bradley House (Wiltshire)|Bradley House]]<br/>[[Berry Pomeroy Castle]] 
| former_seat       = [[Bulstrode Park]] 
| motto             = ''Foy pour devoir'' (Faith for duty)<ref>''Debrett's Peerage'', 1876, p.437</ref> 
| footnotes         =  
}}

'''Duke of Somerset''', from the county of [[Somerset]], is a [[Hereditary title|title]] that has been created five times in the [[Peerage of England]]. It is particularly associated with two families: the [[House of Beaufort|Beauforts]], who held the title from the creation of 1448, and the [[House of Seymour|Seymours]], from the creation of 1547, in whose name the title is still held. The present dukedom is unique, in that the first holder of the title created it for himself in his capacity of [[Lord Protector]] of the [[Kingdom of England]], using a power granted in the will of his brother in law [[King Henry VIII]].

The only subsidiary title of the duke of Somerset is '''Baron Seymour''', which is used as a [[Courtesy titles in the United Kingdom|courtesy title]] by the eldest son and heir of the duke. This courtesy title is the lowest in rank of all heirs to dukedoms in the peerages of the British Isles, yet the holder's [[Order of precedence|precedence]] is higher than his title suggests, by virtue of the seniority of the Dukedom of Somerset (the only more senior non-royal duke is the [[Duke of Norfolk]]).

Several other titles have been held by the dukes of Somerset, but have become extinct. These include: [[Earl of Kendal]] (created 1443, extinct 1444), [[Earl of Somerset]] (created 1397, forfeit 1461), [[Marquess of Dorset]] (created 1397, degraded 1399; created 1442, forfeit 1461), [[Marquess of Somerset]] (created 1397, degraded 1399), [[Earl of Dorset]] (created 1441, forfeit 1461), ''Viscount Rochester'' (created 1611, extinct 1645), ''Viscount Beauchamp of Hache'' (created 1536, forfeit 1552), [[Earl of Hertford]] (created 1537, forfeit 1552; and created 1559, extinct 1750), [[Marquess of Hertford]] (created 1640, extinct 1675), [[Baron Seymour of Trowbridge]] (created 1641, extinct 1750), [[Baron Percy]] (created 1722, separated 1750), ''[[Baron Cockermouth]]'' (created 1749, separated 1750), ''[[Earl of Egremont]]'' (created 1749, separated 1750), and ''Earl St. Maur'' (created 1863, extinct 1885).

The ducal seat is [[Bradley House (Wiltshire)|Bradley House]] in [[Maiden Bradley]], west [[Wiltshire]], with a secondary estate at [[Berry Pomeroy Castle]], [[Totnes]], [[Devon]]. The principal burial place for the Seymour family today is [[All Saints' Church, Maiden Bradley]], adjacent to Bradley House; the church and the family cemetery can be reached from the grounds of Bradley House via private access.<ref>[https://sites.google.com/site/maidenbradley/maiden-bradley-times/duke-s-grave The grave of Algernon Seymour, 15th Duke of Somerset], 19 July 2013</ref>

==Creation of Empress Matilda==
[[William de Mohun of Dunster]] (?–c. 1155), a favourite of [[Empress Matilda]] and a loyal supporter of her in the war against [[Stephen I of England|King Stephen]] (during which he earned the epithet of the "Scourge of the West"), was given the title Earl of Somerset in 1141. In the foundation charter of the priory at Bruton he describes himself as "Willielmus de Moyne, [[comes]] Somersetensis". The title was not recognised by Stephen or [[Henry II of England|Henry II]] (Matilda's son), and his descendants did not use it.

==Beaufort creations==
[[File:Beaufort Arms (France modern).svg|thumb|Beaufort arms: ''Royal arms of King Edward III (with France modern) within a bordure compony argent and azure'']] 
[[John Beaufort, 1st Earl of Somerset|John Beaufort]] (1371/1373–1410) was the eldest son from [[John of Gaunt]]'s marriage to [[Katherine Swynford]]. He was created Earl of Somerset on 10 February 1397; on 9 September 1397, following his marriage to Margaret Holland, daughter of [[Thomas Holland, 2nd Earl of Kent]], he was promoted to Marquess of Somerset,<ref name="genuki">{{cite web|url=http://www.genuki.org.uk/big/eng/History/Barons/ExtinctDukes.html|title=Extinct peerage of England|publisher=GENUKI|access-date=2008-08-09}}</ref> and a few weeks later on 29 September 1397 he was created also Marquess of Dorset.<ref name="x4">{{cite web | url=http://www.europeanheraldry.org/house_of_beaufort_and_somerset.html | title=House of Beaufort and Somerset | publisher=European Heraldry | access-date=27 December 2010 | archive-url=https://web.archive.org/web/20130526132455/http://www.europeanheraldry.org/house_of_beaufort_and_somerset.html | archive-date=26 May 2013 | url-status=dead }}</ref> However, in 1399, when [[Henry IV of England|Henry IV]] came to the throne, his two marquessates were revoked.<ref>{{cite web | url=http://www.luminarium.org/encyclopedia/johnbeaufort1.htm | title=John de Beaufort, 1st Earl of Somerset | publisher=Luminarium | access-date=27 December 2010}}</ref>

The [[House of Commons of England|Commons]] petitioned the King for his restoration, but Somerset himself objected, stating "the name of marquess is a strange name in this realm".<ref>{{cite web | url=http://www.debretts.com/people/essential-guide-to-the-peerage/the-ranks-of-the-peerage/marquess.aspx | title=Marquess | publisher=Debretts | access-date=27 December 2010}}</ref> He was succeeded as Earl of Somerset by his son [[Henry Beaufort, 2nd Earl of Somerset|Henry Beaufort]] (1401–1418), but his early death left the earldom to his brother [[John Beaufort, 1st Duke of Somerset|John Beaufort]] (1404–1444). He was created Duke of Somerset and Earl of Kendal on 28 August 1443 and died less than a year later on 27 May 1444, perhaps by suicide. The Dukedom of Somerset and Earldom of Kendal became extinct.<ref name="genuki"/>

The Earldom of Somerset passed to his brother [[Edmund Beaufort, 2nd Duke of Somerset|Edmund Beaufort]], Count of Mortain (c.1406–1455). Edmund had been created Earl of Dorset on 18 August 1442 and Marquess of Dorset on 24 June 1443. He was created Duke of Somerset under a new creation on 31 March 1448. Despite this, he is usually referred to as the 2nd Duke of Somerset.<ref name="x4"/>

The second duke was killed at the [[First Battle of St Albans]] on 22 May 1455 and his peerages passed to his son [[Henry Beaufort, 3rd Duke of Somerset|Henry Beaufort]] (1436–1464) who had been known as the Earl of Dorset since his father's creation as Duke of Somerset. After the defeat at the [[battle of Towton]] on 29 March 1461 he fled to [[Scotland]] and was attainted on 4 November 1461. All his honours and estates were declared forfeit. His titles were restored to him on 10 March 1463 but he deserted the King and was captured and beheaded after the [[battle of Hexham]] on 15 May 1464.<ref>{{cite web|title=Henry Beaufort, 3rd Duke of Somerset|url=http://www.luminarium.org/encyclopedia/henrybeaufort2.htm|work=Luminarium|publisher=Anniina Jokinen.|access-date=6 October 2012}}</ref>

He was unmarried, but his illegitimate son [[Charles Somerset, 1st Earl of Worcester|Charles Somerset]] became the 1st [[Earl of Worcester]]. Henry's titles were forfeited by act of Parliament; but his brother [[Edmund Beaufort, 4th Duke of Somerset|Edmund Beaufort]] (c.1439–1471) was styled Duke of Somerset by the [[House of Lancaster|Lancastrians]].<ref>Jonathan Hughes, "[http://www.oxforddnb.com/view/article/26004 Somerset, Charles, first earl of Worcester (c.1460–1526)]", ''Oxford Dictionary of National Biography'', Oxford University Press, September 2004; online edition, January 2007 [accessed 1 Sept 2010] (Subscription required for online version)</ref> After the [[Battle of Tewkesbury]] on 4 May 1471 he fled and took refuge in [[Tewkesbury Abbey]]. He was beheaded by the [[Yorkist]]s, and buried in the abbey church. Upon his death the house of Beaufort became extinct in the legitimate line.<ref name="genuki"/>

==Royal family creations==
In 1499 [[Henry VII of England|Henry VII]] nominated his infant son [[Edmund Tudor, Duke of Somerset|Edmund]] to the dukedom of Somerset at his baptism, but the child, just over a year old when he died,<ref name="genuki"/> was probably never formally created a peer.

The illegitimate son of [[Henry VIII]], [[Henry FitzRoy, Duke of Richmond and Somerset|Henry FitzRoy]] (1519–1536), by [[Elizabeth Blount]], was created [[Earl of Nottingham]], and [[Duke of Richmond]] and Somerset on 18 June 1525. He died without heirs on 23 July 1536 so his titles became extinct.<ref name="Murphy">{{Cite book|last=Murphy|first=Beverley A.|title=Bastard Prince: Henry VIII's Lost Son|publisher=Sutton|year=2001|isbn=0-7509-2684-8}}</ref>

==Earl of Somerset under James VI and I==
[[Robert Carr, Earl of Somerset|Robert Carr]] (c. 1587–1645), born Kerr/Ker, son of [[Thomas Kerr of Ferniehirst|Sir Thomas Ker]] of [[Ferniehirst Castle|Ferniehirst]], became a [[favourite]] of King [[James VI and I]]. On 25 March 1611 he was created Viscount Rochester, and subsequently a [[privy council]]lor. On the death of [[Robert Cecil, 1st Earl of Salisbury|Lord Salisbury]] in 1612 he began to act as the king's secretary. On 3 November 1613 he was created Earl of Somerset. He died in July 1645, leaving a daughter, [[Anne Russell, Countess of Bedford|Anne]]. His titles became extinct.<ref>{{cite web | url=http://www.luminarium.org/encyclopedia/carr.htm|title=Robert Carr, Earl of Somerset (d.1645) | publisher=Luminarium|access-date=6 October 2012}}</ref>

==Seymour creation and 17th century claim to revert to Beaufort creations==
[[File:COA of Seymour.svg|thumb|200px|Arms of Seymour: ''Gules, two wings conjoined in lure or'']]
[[Image:Edsemor.JPG|thumb|200px|Edward Seymour, 1st Duke of Somerset]]
[[Edward Seymour, 1st Duke of Somerset]] (c.1500–1552), was the eldest brother of [[Jane Seymour]], the third wife of King [[Henry VIII]], and was thus the uncle of King [[Edward VI]]. Henry had created him '''Viscount Beauchamp''' "of [[Hatch Beauchamp|Hache]]" in 1536, at the time of the marriage, and '''Earl of Hertford''' in 1537. On the death of Henry VIII on 28 January 1547, Seymour was named in the king's will as one of his sixteen executors who then formed a regency council to rule during the minority of his nine-year-old son and successor King Edward VI. Seymour was elected head of the council, which on 1 February 1547 appointed him as "[[Lord Protector|Lord Protector of the Realm]] and Governor of the King's Person", when he became "the most powerful man in England, a king in all but name" and ruled by proclamation.<ref>[https://www.tudorsociety.com/edward-seymour-duke-somerset/ Sarah Bryson, "Edward Seymour, Duke of Somerset", www.tudorsociety.com]</ref>
On 17 February 1547<ref>[https://www.tudorsociety.com/17-february-1547-edward-seymour-becomes-duke-of-somerset/ http://www.tudorsociety.com]</ref> the Council created him "Duke of Somerset", which reflected his ancient title as [[Feudal barony of Hatch Beauchamp|feudal baron of Hatch]] in Somerset, centred on the manor of [[Hatch Beauchamp]], inherited by his ancestor Roger Seymour (d.c.1361) from his marriage to Cecily Beauchamp (d.1393), the aunt and heiress of John IV de Beauchamp, 3rd Baron Beauchamp (1330–1361).<ref>Cookson, Christopher, ''Hatch Beauchamp Church'', section: ''Historical Note on the Church and its Associations'', 1972 [http://www.weavo.co.uk/hatch/hatch.htm] {{Webarchive|url=https://web.archive.org/web/20160303184103/http://www.weavo.co.uk/hatch/hatch.htm|date=2016-03-03}}</ref> On 10 August 1547 he obtained royal [[letters patent]] to bear the [[Augmentation of honour|augmented coat of arms]] previously granted in 1536 by Henry VIII to Jane Seymour.<ref>Seymour Papers at Longleat House, Wiltshire "Patent to (Edward Seymour, Duke of Somerset) to bear the coat of augmentation granted to Queen Jane Seymour, 10 Aug., 1547. Box I.10.f.119"[https://discovery.nationalarchives.gov.uk/details/r/c333fd47-3a07-4d97-a76d-444096a31f46]</ref> Edward Seymour married twice; in about 1535 he divorced his first wife, [[Catherine Fillol]], disowning her and her children, and married Anne Stanhope who bore him nine children. The patent of the dukedom specified that it was to descend to his issue by his second wife Anne Stanhope, thus excluding his eldest son by his first wife from the title, except in case of the failure of male heirs from the junior line. In 1547 he bought [[Berry Pomeroy Castle]] in Devon from Sir Thomas Pomeroy,  although he probably never visited it, and it became the seat of his eldest son from his first marriage, Edward Seymour (1527/1535–1593), whose son was made a [[Seymour baronets|baronet "of Berry Pomeroy"]]. On the failure of the junior male line in 1750, Sir [[Edward Seymour, 8th Duke of Somerset|Edward Seymour, 6th Baronet]] of Berry Pomeroy became the 8th Duke of Somerset, as the patent allowed, and his descendants, seated at [[Maiden Bradley House]] in Wiltshire, continue to bear the title today.

Less than two years after losing his position as Lord Protector, his titles were forfeited and he was beheaded on 22 January 1552.<ref>{{cite book|title=A companion and key to the history of England; consisting of copious genealogical details of the British sovereigns, with an appendix, exhibiting a chronological epitome of the successive holders of the several titles of the ... nobility, etc, with their armorial bearings|date=1832|page=496|url=https://books.google.com/books?id=cCBkAAAAcAAJ&q=edward+seymour+beheaded+1552&pg=PA496}}</ref> He was replaced in the minority government of Edward VI by [[John Dudley]], Duke of Northumberland, whose pragmatic style contrasted with Seymour's mixture of idealism and arrogance.

In 1644 [[Charles I of England|Charles I]] granted the earldom of Glamorgan to [[Edward Somerset, 2nd Marquess of Worcester|Edward Somerset]] (1613–1667). He was a descendant of Charles Somerset, the illegitimate son of Henry Beaufort, 3rd Duke of Somerset. In return for obtaining military help from [[Ireland]] he promised Edward the title of Duke of Somerset.<ref>{{cite web|last=Plant|first=David|title=The Glamorgan Treaty, 1645|url=http://www.british-civil-wars.co.uk/glossary/glamorgan-treaty.htm|work=British Civil Wars, Commonwealth & Protectorate 1638–60|access-date=25 August 2010|date=25 May 2009}}</ref> Under the [[Commonwealth of England|Commonwealth]] Edward was banished from England and his estates were seized. At the [[English Restoration|Restoration]] his estates were restored, and he claimed the dukedom of Somerset as promised to him by Charles I. However, this claim was rejected by the [[House of Lords]], and so was the title of [[Earl of Glamorgan]]. This enabled King Charles II to restore the ducal title to the fourth creation family, the Seymours, who descend from the country's de facto regent, the lord protector in 1547.

[[File:Duke of Somerset coa.png|right|thumb|200px|Coat of Arms of the Seymour Dukes of Somerset. Crest: ''Out of a ducal coronet or a demi-phoenix in flames proper''. Supporters: [[Dexter and sinister|dexter]]: ''A unicorn argent armed unguled and crined or gorged with a ducal coronet per pale azure and or and chained of the last''; [[Dexter and sinister|sinister]]: ''A bull azure armed unguled ducally gorged and chained or''<ref name="Debrett's Peerage, 1968, p.1036">Debrett's Peerage, 1968, p.1036</ref>]]
[[Edward Seymour, 1st Earl of Hertford|Edward Seymour]] (1538–1621) was son and heir of Edward Seymour, 1st Duke of Somerset, from his second marriage. He was created the Earl of Hertford in 1559 under [[Elizabeth I]]. His grandson [[William Seymour, 2nd Duke of Somerset|William Seymour]] (1588–1660) secretly married Lady [[Arbella Stuart]] (1575–1615) on 22 June 1610. She was the niece of [[Lord Darnley]], a Stuart, first cousin of James I and bar for James's children next in succession to Scottish and English thrones. Both William and Arabella were imprisoned but managed to escape. William fled to [[Paris]], but Arbella was recaptured. She was imprisoned in the [[Tower of London]] where she died in 1615. William returned to England shortly after her death and inherited his father's titles in 1621. Charles I received his support and made him [[Marquess of Hertford]] in 1640 and on 13 September 1660, shortly before his death on 24 October, the title of Duke of Somerset was restored to him as its legitimate heir, following its non-existence for 108 years. He outlived his three eldest sons and as the dukedom descends to heirs male of the holder of the 1547 grant it passed to [[William Seymour, 3rd Duke of Somerset|William Seymour]] (1654–1671) who was the son of [[Henry Seymour, Lord Beauchamp|the third son mentioned]] (lived 1626–1654). The 3rd duke died unmarried and the title passed to [[John Seymour, 4th Duke of Somerset|John Seymour]] (bef. 1646–1675) the last surviving son of the 2nd Duke, his uncle. On his death without issue on 29 April 1675 only the Marquessate of Hertford became extinct. His distant cousin [[Francis Seymour, 5th Duke of Somerset|Francis Seymour, 3rd Baron Seymour of Trowbridge]] (1658–1678) became 5th Duke of Somerset. Francis was the eldest surviving son of [[Charles Seymour, 2nd Baron Seymour of Trowbridge|Charles Seymour]] (1621–1665), whose father Sir [[Francis Seymour, 1st Baron Seymour of Trowbridge|Francis Seymour]] (c. 1590–1664), a younger brother of the 2nd Duke of Somerset, had been created Baron Seymour of Trowbridge in 1641.

When the 5th Duke died unmarried in 1678, the title passed to his brother, [[Charles Seymour, 6th Duke of Somerset|Charles Seymour]] (1662–1748), youngest son of the 2nd Baron Trowbridge. The 6th Duke, known as "the Proud Duke",<ref name="6th">{{cite web|url=http://auden.stanford.edu/cgi-bin/auden/individual.php?pid=I1926&ged=auden-bicknell.ged|title=Charles Seymour 6th Duke of Somerset|work=W.H. Auden Family Ghosts|publisher=Stanford University|access-date=2008-08-09|archive-url=https://web.archive.org/web/20110720045826/http://auden.stanford.edu/cgi-bin/auden/individual.php?pid=I1926&ged=auden-bicknell.ged|archive-date=2011-07-20|url-status=dead}}</ref> was a favourite of [[Anne, Queen of Great Britain|Queen Anne]]. He first married Lady [[Elizabeth Seymour, Duchess of Somerset|Elizabeth Percy]],<ref name="6th"/> daughter of [[Joceline Percy, 11th Earl of Northumberland]] (1644–1670). She died in 1722 and in 1725 he married Lady Charlotte Finch (1711–1773), daughter of [[Daniel Finch, 2nd Earl of Nottingham]]. The 6th duke died 2 December 1748, at [[Petworth House]], [[Sussex]]<ref name="6th"/> at age 86 leaving the title to his son from his first marriage [[Algernon Seymour, 7th Duke of Somerset|Algernon Seymour]] (1684–1750).

;Later subsidiary titles
Algernon had been created Baron Percy in 1722. After succeeding his father as 7th Duke of Somerset he was created Earl of Northumberland in 1749, the Earldom of Northumberland having become extinct with the death of his maternal grandfather in 1670. The remainder of the earldom was to pass to Sir [[Hugh Percy, 1st Duke of Northumberland|Hugh Smithson]], husband of Algernon's daughter Elizabeth Seymour (bef. 1730–1776), whilst the titles Baron Cockermouth and Earl of Egremont were remaindered to the children of his sister, Lady Catherine Seymour (1693–1731). Without male issue, on his death in February 1750 these titles therefore passed to different families in accordance with the remainders in the patents of their creation. The earldom of Hertford, the barony of Beauchamp, and the barony of Seymour of Trowbridge became extinct; and the dukedom of Somerset, together with the barony of Seymour, devolved on his distant cousin.<ref>{{cite web | url=http://familytrees.genopro.com/ralphballard/default.htm?page=BaronPercy7thDukeOfSomers-Algernon-ind00244.htm | title=Algernon Baron Percy, 7th Duke of Somerset, Earl of Northumberland | publisher=Moore, Simpson, Ballard Family Tree – England and Scotland to Australia | access-date=27 December 2010}}</ref>

;Later descent
Sir [[Edward Seymour, 8th Duke of Somerset|Edward Seymour, 6th baronet of Berry Pomeroy]] (1694–1757) became the 8th Duke of Somerset in 1750. The 1st baronet was (Sir) Edward Seymour (1556–1613), son of Edward Seymour (1527/1535–1593) who was the 1st Duke's eldest son and of Catherine Seymour (née Filliol). He was a seventh-generation descendant of the 1st Duke. The 4th Baronet had been speaker of the [[British House of Commons|House of Commons]] during the reign of [[Charles II of England|Charles II]] and he moved the family home from [[Berry Pomeroy Castle]] in Devon to Bradley House in [[Maiden Bradley]].<ref>Report and Transactions of The Devonshire Association for the Advancement of Science, Literature and the Arts. Vol 133 (2001), p 11-12.</ref>

Upon this Duke's death he was succeeded by his eldest son [[Edward Seymour, 9th Duke of Somerset|Edward Seymour]] (1717–1792). He died unmarried and was succeeded by his brother [[Webb Seymour, 10th Duke of Somerset|Webb Seymour]] (1718–1793) who became the 10th Duke. His son [[Edward Adolphus Seymour, 11th Duke of Somerset|Edward Adolphus Seymour]] (1775–1855) was a noted mathematician and became the 11th Duke upon his father's death. He changed the family name to St. Maur, but Seymour was still very often used.

==12th Duke and sons, the Earls St. Maur==
[[Image:12th Duke of Somerset.png|thumb|Edward Seymour]]
The 11th Duke was succeeded by his eldest son [[Edward Adolphus Seymour, 12th Duke of Somerset|Edward Adolphus Seymour]] (1804–1885) who was created Earl St. Maur, [[territorial designation|of Berry Pomeroy]] in 1863. His eldest son who predeceased him [[Edward Adolphus Ferdinand Seymour, Earl St. Maur|Edward A. F. Seymour]] (1835–1869) was known as Lord Seymour until 1863 as a courtesy title he adopted ''Earl St. Maur''. Commonly known as Ferdy, he was an adventurer who joined [[Giuseppe Garibaldi|Garibaldi]]'s army under the assumed name of Capt. Richard Sarsfield. In 1866 he began a relationship with a 17-year-old maid called Rosina Swan. The Earl took Rosina with him during his travels, returning to England with her in 1868 to live near [[Brighton]]. Ferdy and Rosina had two children; a girl named [[Ruth Cavendish-Bentinck|Ruth]] (1867–1953) was born whilst the couple were in [[Tangier]] and a boy named Richard 'Harold' St. Maur (1869–1927) was born in Brighton shortly before the death of his father. Had the Earl [[illegitimate children|married Rosina]], Harold would have been the heir to his grandfather's dukedom and for this reason Harold tried to find proof that the couple had married whilst they were living in the Netherlands, offering reward of £50 (equal to about £{{formatnum:{{Inflation|UK|50|1885|r=-3}}}} today){{Inflation-fn|UK|df=y}} for evidence to support the claim, but was unsuccessful.

==13th–19th dukes==
The 12th Duke died on 28 December 1885 aged 81 outliving both of his sons with no legitimate male heirs and the title passed to his aged unmarried brother [[Archibald Henry Algernon Seymour, 13th Duke of Somerset|Archibald Henry Algernon Seymour]] (1810–1891). When he died a few years later, the youngest brother [[Algernon Percy Banks St. Maur, 14th Duke of Somerset|Algernon Percy Banks St. Maur]] (1813–1894) became the 14th Duke.<ref>Burke's Peerage, Baronetage and Knightage, 107th edition, vol. 3, ed. Charles Mosley, Burke's Peerage Ltd, p. 3681</ref> Three and a half years later he was dead. His son [[Algernon Seymour, 15th Duke of Somerset|Algernon Seymour]] (1846–1923) became the 15th Duke.

He died without children and the title passed to his distant cousin [[Edward Hamilton Seymour, 16th Duke of Somerset|Edward Hamilton Seymour]] (1860–1931), great-great-grandson of [[Lord Francis Seymour]], [[Dean of Wells]] (1726–1799), youngest son of the 8th Duke. He was succeeded by his son [[Evelyn Francis Seymour, 17th Duke of Somerset|Evelyn Francis Seymour]] (1882–1954) who passed the title on to his son [[Percy Hamilton Seymour, 18th Duke of Somerset|Percy Hamilton Seymour]] (1910–1984). The title is currently held by his son [[John Michael Edward Seymour, 19th Duke of Somerset|John Michael Edward Seymour]] who was born in 1952. The current heir to the title is Sebastian Seymour, Lord Seymour who was born in 1982.<ref>Burke's Peerage, Baronetage and Knightage, 107th edition, vol. 3, ed. Charles Mosley, Burke's Peerage Ltd, p. 3678</ref>

==Arms==
{{Infobox COA wide
|image = Coat of arms of the duke of Somerset.png
|crest = Out of a Coronet Or a Phoenix of the Last issuing from Flames Proper
|coronet = [[Coronet|That of a Duke]]
|escutcheon = Quarterly: 1st and 4th, Or on a Pile Gules between six Fleurs-de-Lis Azure three Lions of England (being the Augmentation of Honour granted by King Henry VIII on his marriage with [[Jane Seymour]]);  2nd and 3rd, Gules two Wings joined in lure the tips downwards Or (Seymour)
|supporters = Dexter:  a Unicorn Argent armed maned and tufted Or gorged with a Coronet per pale Azure and Or to which is affixed a Chain of the Last; Sinister: a Bull Azure gorged with a Coronet chained hoofed and armed Or
|motto ='''''FOY POUR DEVOIR''''' ([[Middle French]] for ''FAITH FOR DUTY'') 
|orders  =
}}

==Earls of Somerset, first creation (1141)==
*[[William de Mohun of Dunster, 1st Earl of Somerset]] (d. c.1155) whose descendants have never claimed the title

==Earls of Somerset, second creation (1397)==
*[[John Beaufort, 1st Earl of Somerset]] (1371/1373–1410), eldest legitimated son of [[John of Gaunt, 1st Duke of Lancaster|John ''of Gaunt'', 1st Duke of Lancaster]]

==Marquesses of Somerset (1397)==
*John Beaufort, 1st Marquess of Somerset, 1st Marquess of Dorset (1371/1373–1410) was created Marquess later the same year for his role as a counter-[[Lords Appellant|appellant]]

==Earls of Somerset, second creation (1397; reverted)==
* [[John Beaufort, 1st Earl of Somerset]] (c. 1373–1410) lost his marquessates when [[Henry IV of England|Henry IV]] acceded in 1399
* [[Henry Beaufort, 2nd Earl of Somerset]] (1401–1418), eldest son of the 1st Earl
* [[John Beaufort, Duke of Somerset|John Beaufort, 3rd Earl of Somerset, 1st Duke of Somerset]] (1404–1444), brother of preceding, created Duke of Somerset in 1443 (see below)
* [[Edmund Beaufort, 1st Duke of Somerset|Edmund Beaufort, 4th Earl of Somerset]] (c. 1406–1455), brother of preceding, raised to a dukedom in 1448 (see below)

==Dukes of Somerset, first creation (1443)==
* [[John Beaufort, 1st Duke of Somerset]] (1404–1444) died without male issue, when his dukedom became extinct

==Dukes of Somerset, second creation (1448)==
:''Often numbered 2nd – 4th to include John, the brother of the Edmund, whose title was nonetheless technically extinct''
* [[Edmund Beaufort, 2nd Duke of Somerset]] (c. 1406–1455) became Duke of Somerset in 1448
* [[Henry Beaufort, 3rd Duke of Somerset]] (1436–1464), eldest son of Edmund, whose titles were forfeit from 1461 to 1463
* [[Edmund Beaufort, 4th Duke of Somerset]] (c. 1438–1471), second son of Edmund, may or may not be considered Duke, but was so styled by [[House of Lancaster|Lancastrians]] (see article for details)

==Duke of Somerset, third creation (1499)==
*[[Edmund Tudor, Duke of Somerset (1499-1500)|Edmund Tudor, 1st Duke of Somerset]] (1499–1500), third son of [[Henry VII of England|Henry VII]], died in infancy

==Duke of Richmond and Somerset (1525)==
*[[Henry FitzRoy, 1st Duke of Richmond and Somerset]] (1519–1536), illegitimate son of [[Henry VIII]], died without issue

==Dukes of Somerset, fourth creation (1547)==
*[[Edward Seymour, 1st Duke of Somerset]] (c. 1500–1552), uncle to and [[Lord Protector]] of [[Edward VI]], was deposed and executed and his titles forfeit in 1552.
{{for|the intervening generations|Edward Seymour, Viscount Beauchamp|Marquess of Hertford#Earls of Hertford, Third creation (1559)|Marquess of Hertford#Marquesses of Hertford, First creation (1641)}}

==Earls of Somerset, third creation (1613)==
*[[Robert Carr, 1st Earl of Somerset]] (c.1590–1645), a [[favourite]] of [[James VI & I]], died without issue

==Dukes of Somerset, fourth creation restored (1660)==
*[[William Seymour, 2nd Duke of Somerset]] (1588–1660), great-grandson of the 1st Duke through the 1st Duke's third son, [[Edward Seymour, 1st Earl of Hertford]], and a [[Cavalier]], was rewarded with restoration to the dukedom soon after the [[Stuart Restoration]]
**William Seymour, Lord Beauchamp (1621–1642), eldest son of the 2nd Duke, predeceased his father unmarried
**Robert Seymour, Lord Beauchamp (1622–1646), second son of the 2nd Duke, predeceased his father unmarried
**[[Henry Seymour, Lord Beauchamp]] (1626–1654), third son of the 2nd Duke, predeceased his father
*[[William Seymour, 3rd Duke of Somerset]] (1650–1671), only son of [[Henry Seymour, Lord Beauchamp]], died without issue
*[[John Seymour, 4th Duke of Somerset]] (bef. 1646–1675), fourth and youngest son of the 2nd Duke, died without issue
*[[Francis Seymour, 5th Duke of Somerset]] (1658–1678), great-grandson of [[Edward Seymour, Viscount Beauchamp]] through the [[Baron Seymour of Trowbridge|Lords Seymour of Trowbridge]]; himself eldest son of the 1st Duke's fourth son; [[Edward Seymour, 1st Earl of Hertford]]; died without issue
*[[Charles Seymour, 6th Duke of Somerset]] (1662–1748), "The Proud Duke", younger brother of the 5th Duke
*[[Algernon Seymour, 7th Duke of Somerset]] (1684–1750), eldest son of the 6th Duke
**George Seymour, Viscount Beauchamp (1725–1744), only son of the 7th Duke, predeceased his father without issue
*[[Edward Seymour, 8th Duke of Somerset]] (1695–1757), great-great-great-grandson of [[Sir Edward Seymour, 1st Baronet]] of the [[Seymour baronets#Seymour baronets, of Berry Pomeroy (1611)|Seymour Baronets of Berry Pomeroy]]; himself only son of the 1st Duke's second son having male issue; [[Sir Edward Seymour, of Berry Pomeroy]]
*[[Edward Seymour, 9th Duke of Somerset]] (1717–1792), eldest son of the 8th Duke
*[[Webb Seymour, 10th Duke of Somerset]] (1718–1793), second son of the 8th Duke
*[[Edward St Maur, 11th Duke of Somerset|Edward Adolphus St Maur, 11th Duke of Somerset]] (1775–1855), only son of the 10th Duke
*[[Edward Seymour, 12th Duke of Somerset|Edward Adolphus Seymour, 12th Duke of Somerset]] (1804–1885), eldest son of the 11th Duke
**[[Ferdinand Seymour, Earl St. Maur|Edward Adolphus Ferdinand Seymour, Earl St Maur]] (1835–1869), eldest son of the 12th Duke, predeceased his father without legitimate issue
*[[Archibald Seymour, 13th Duke of Somerset|Archibald Algernon Henry Seymour, 13th Duke of Somerset]] (1810–1891), second son of the 11th Duke, died without issue
*[[Algernon St Maur, 14th Duke of Somerset|Algernon Percy Banks St Maur, 14th Duke of Somerset]] (1813–1894), third and youngest son of the 11th Duke
*[[Algernon St Maur, 15th Duke of Somerset]] (1846–1923), eldest son of the 14th Duke, died without issue
*[[Edward Seymour, 16th Duke of Somerset|Edward Hamilton Seymour, 16th Duke of Somerset]] (1860–1931), great-great-grandson of the Very Reverend Lord Francis Seymour, fourth and youngest son of the 8th Duke
*[[Evelyn Seymour, 17th Duke of Somerset|Evelyn Francis Edward Seymour, 17th Duke of Somerset]] (1882–1954), only son of the 16th Duke
**Francis William Seymour (1906–1907), eldest son of the 17th Duke, died in infancy
**Algernon Francis Edward Seymour (1908–1911), second son of the 17th Duke, died young
*[[Percy Seymour, 18th Duke of Somerset|Percy Hamilton Seymour, 18th Duke of Somerset]] (1910–1984), third and youngest son of the 17th Duke
*[[John Seymour, 19th Duke of Somerset|John Michael Edward Seymour, 19th Duke of Somerset]] (b. 1952), eldest son of the 18th Duke
The [[heir apparent]] is the present holder's eldest son Sebastian Edward Seymour, Lord Seymour (b. 1982).

==Earls St Maur (1863 creation)==
*[[Edward Seymour, 12th Duke of Somerset|Edward Adolphus Seymour, 12th Duke of Somerset, 1st Earl St Maur]] (1804–1885) was created Earl St Maur (pronounced "Seemer") in the [[peerage of the United Kingdom]] when already Duke of Somerset, in order to provide a more senior [[courtesy title]] for his heir.
**[[Ferdinand Seymour, Earl St. Maur|Edward Adolphus Ferdinand Seymour, Earl St Maur]] (1835–1869), the eldest son of the 12th Duke, in the event was the only man called "Earl St Maur", as he and his younger brother both died unmarried. In 1885, when the Dukedom reverted to his [[Archibald Seymour, 13th Duke of Somerset|uncle]], the earldom became extinct.

==Succession to the Dukedom==
{{tree list}}
*[[File:Coronet of a British Duke.svg|25px]] ''Percy Seymour, 18th Duke of Somerset (1910–1984)''
**[[File:Coronet of a British Duke.svg|25px]] '''John Seymour, 19th Duke of Somerset''' (born 1952)
***'''(1).''' Sebastian Edward, Lord Seymour (b. 1982)
***'''(2).''' Lord Charles Thomas George Seymour (b. 1992)
**'''(3).''' Lord Francis Charles Edward Seymour (b. 1956)
***'''(4).''' Webb Edward Percy Seymour (b. 1990)

After those in the above immediate line of succession, the [[Marquess of Hertford]] and his legitimate male heirs and relations in the senior male line of the Seymour dynasty are next in line to the dukedom. 
{{tree list/end}}
<ref>{{cite book |year=2019|chapter=Somerset, Duke of (Seymour) |editor1-last=Morris |editor1-first=Susan |editor2-last=Bosberry-Scott |editor2-first=Wendy |editor3-last=Belfield |editor3-first=Gervase |title=Debrett's Peerage and Baronetage|volume=1 |edition=150th |location=London |publisher=Debrett's Ltd. |publication-date=|pages=3224–3228 |arxiv= |bibcode= |doi= |isbn=978-1-999767-0-5-1}}</ref>

== Family trees ==
{{Dukes of Beaufort, Lancaster, and Somerset family tree}}
{{Royal dukes family tree}}

==See also==
*[[Duchess of Somerset (disambiguation)|Duchess of Somerset]]
*[[Marquess of Hertford]]
*[[Baron Alcester]]
*[[Seymour Baronets]]
*[[Somerset House, Park Lane]]

==References==
{{Reflist}}

{{Extant British dukedoms}}
{{Dukes of Somerset}}

{{DEFAULTSORT:Somerset}}
[[Category:Dukes of Somerset| ]]
[[Category:Dukedoms in the Peerage of England]]
[[Category:Seymour family|!]]
[[Category:Noble titles created in 1443]]
[[Category:Noble titles created in 1448]]
[[Category:Noble titles created in 1499]]
[[Category:Noble titles created in 1547]]