Frederick William

The name Frederick William usually refers to several monarchs and princes of the Hohenzollern dynasty:

Frederick William, Elector of Brandenburg (1620–1688)
Frederick William, Duke of Mecklenburg-Schwerin (1675–1713)
Frederick William I of Prussia (1688–1740), King of Prussia
Frederick William II of Prussia (1744–1797), King of Prussia
Frederick William III of Prussia (1770–1840), King of Prussia
Frederick William IV of Prussia (1795–1861), King of Prussia
Frederick William, Grand Duke of Mecklenburg-Strelitz (1819–1904)
Frederick III, German Emperor (1831–1888), German Emperor and King of Prussia. He was known as Frederick William when he was Crown Prince.
Prince Friedrich Wilhelm of Prussia (1880–1925), son of Prince Albert of Prussia and great-grandson of Frederick William III.

Other nobility with the name Frederick William are:

Frederick William von Steuben (1730–1794), Prussian officer in the American Revolutionary War
Frederick William von Hessenstein (1735–1808), Swedish statesman and soldier
Frederick William Hervey, 1st Marquess of Bristol (1769–1859)
Frederick William, Duke of Brunswick and Lüneburg (1771–1815)
Frederick William, Elector of Hesse (1802–1875)
Frederick William Pethick-Lawrence, 1st Baron Pethick-Lawrence (1871–1961)
Frederick William Mulley (1918–1995), British politician and economist
Prince Frederick William of Schleswig-Holstein-Sonderburg-Augustenburg (1668–1714)
Prince Frederick of Great Britain (1750–1765), son of Frederick, Prince of Wales
Prince Frederick William of Solms-Braunfels (1770–1814)
Prince Frederick William of Hesse-Kassel (1820–1884)
Frederick William III, Landgrave of Hesse (1854–1888)

Other uses

Frederick William Chapman (1806-1876), American Congregational minister, educator, and genealogist
Frederick William Lewis (died 1907), Canadian politician from Ontario
Frederick William University (Friedrich-Wilhelms-Universität), a predecessor to the Humboldt University of Berlin
Mount Frederick William, Jervis Inlet region, British Columbia, Canada