List of Famous people named William

William Adam was a Scottish architect, mason, and entrepreneur. He was the foremost architect of his time in Scotland, designing and building numerous country houses and public buildings, and often acting as contractor as well as architect. Among his best known works are Hopetoun House near Edinburgh, and Duff House in Banff. His individual, exuberant style built on the Palladian style, but with Baroque details inspired by Vanbrugh and Continental architecture.

William I of Hauteville, known as William Iron Arm, was a Norman adventurer who was the founder of the fortunes of the Hauteville family. One of twelve sons of Tancred of Hauteville, he journeyed to the Mezzogiorno with his younger brother Drogo in the first half of the eleventh century (c.1035), in response to requests for help made by fellow Normans under Rainulf Drengot, count of Aversa.

William Byron, 4th Baron Byron was an English nobleman, politician, peer, and Gentleman of the Bedchamber to Prince George of Denmark.

William Awihilima Kahaialiʻi, known as Willie K, was a Hawaiian musician who performed in a variety of styles, including blues, rock, opera and Hawaiian music.

Vice-Admiral William Waldegrave, 8th Earl Waldegrave, CB was a British naval commander and politician.

General Sir William Francis Patrick Napier KCB was an Irish soldier in the British Army and a military historian.

William Bateman-Hanbury, 1st Baron Bateman of Shobdon was a Member of Parliament and later a Baron in the Peerage of the United Kingdom.

William Reibert Mapother Jr. is an American actor, known for his role as Ethan Rom on the television series Lost and starring in the film In the Bedroom. He is also known for the film Another Earth.