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 Pethick-Lawrence, 1st Baron Pethick-Lawrence (1871-1961)
Frederick William Mulley (1918-1995), British politician and economist
Prince Frederick of Great Britain (1750–1765), son of Frederick, Prince of Wales

Other uses:

Frederick William University (Friedrich-Wilhelms-Universität), an older name of the Humboldt University of Berlin
Mount Frederick William, Jervis Inlet region, British Columbia, Canada

See also