William (disambiguation)

William may refer to:
 * William Dawes, Jr (1745 – 1799), an American tanner and Patriot during the American Revolutionary War.
 * William Greer (22 September 1909 - 23 February 1985), an agent of the United States Secret Service.
 * William Howe (10 August 1729 – 12 July 1814), a British Army officer and the Commander-in-Chief of the British forces during the American Revolutionary War.
 * William Johnson (1715 – 1774), an official of the British Empire and a member of the Templar Order.
 * William Kidd (1645 – 1701), a sailor and privateer for the English Parliament.
 * William Maxwell (1733 - 4 November 1796), a Brigadier General in the Continental Army during the American Revolutionary War.
 * William Miles, a member of the Assassin Order and the father of Desmond Miles.
 * William Miles' codex, a codex written by William Miles.
 * William Miles' email, an email used by William Miles on the Hephaestus Email Network.
 * William Molineux (1717 - 22 October 1774), a merchant and Patriot revolutionary during the American Revolution.
 * William of Montferrat (1136 - 1191), a Crusader and a member of the Templar Order.
 * William de Saint-Prix, an Assassin born to a wealthy family of French descent.
 * William Thompson (1736 - 1781), a Brigadier General in the Continental Army.
 * Warren Vidic (unknown – 2012), a member of the Templar Order and a scientist at Abstergo Industries who used the alias "William M." in correspondence with Lucy Stillman.
 * William Wynn Westcott (17 December 1848 - 30 July 1925), a coroner, ceremonial magician, and Freemason.
 * William Woodford (6 October 1734 – 13 November 1780), a Colonel in the Continental Army during the American Revolutionary War.
 * William Robert Woodman (1828 - 1891), a co-founder of the Hermetic Order of the Golden Dawn.