Dempsey

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Dempsey is a surname of Irish origin.

Background

Dempsey is an anglicised form of Ó Díomasaigh, 'descendant of Díomasach'; this personal name is the Irish adjective díomasach 'proud'.[1][2] The family originated in the Kingdom of Uí Failghe.

According to John Grenham:[3]

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Another source states:[4]

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According to historian C. Thomas Cairney, the O'Dempseys were one of the chiefly families of the Ui Failghe who in turn were a tribe from the Dumnonii or Laigin who were the third wave of Celts to settle in Ireland during the first century BC.[5]

Descent

An Ó Diomasaigh genealogy records the following:[4]

Flann m. Máel Ruanaid m. Cellaich m. Máel Augra m. Conchobuir m. Áeda m. Tomaltajich m. Flaind m. Díumasaich m. Congaile m. Forannáin m. Congaile m. Máel h-Umai m. Cathail m. Bruidge m. Nath Í m. Rosa Failgi.

The final person may be identical with Failge Berraide (fl. 507–514), a king of the Uí Failghe and of Laigin descentTemplate:Crossref.

Dempseys in the annals

The Irish annals list a number of members of the family:

  • 789: Áedh [grandfather of Máelaugrai] was slain by Óengus son of Mugrón, king of Uí Failghe, in the oratory of Kilclonfert.
  • 1141: Donnchadh, son of Goll Gaibhle, i.e. Ua Conchobhair Failghe, was killed by the Uí Failghe themselves, i.e. the Clann-Maelughra.
  • 1161: Domhnall, son of Conghalach, son of Cuaifne Ua Conchobhair Failghe, Tanist of Uí Failghe, was slain by the Clann-Maelughra.
  • 1164: Maelseachlainn Ua Conchobhair Failghe, was slain by the Clann-Maelughra.
  • 1193: Diarmait, son of Cubrogam Ua Diumasaigh, chief of Clann-Mailighra and king of Uí Failghe for a long time, died.
  • 1383: Dermot O'Dempsy, Lord of Kinel-Maoilughra, was slain by the English.
  • 1394: Thomas O'Dempsy, heir to the lordship of Clann-Maoilughra, was slain by the English.

Other Dempsey families

An unrelated family, rendered in Irish as Mac Diomasaigh, are found in County Antrim and its neighbouring counties.[6]

Bearers of the name

Notable people with the surname Dempsey include:

As a given name:

Fictional Characters:

See also

References

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  • Matthews, Thomas (1903) Account of the O'Dempseys, Chiefs of Clan Maliere

External links

Template:Laigin Template:Given name

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