As a result of the Burke Civil War of the 1330s, the Lordship of Connacht was split between two opposing factions of the de Burgh family: the Burkes of Mac William Uachtar (or Clanricarde) in southern Connacht and the Mac William Íochtar Bourkes of northern Connacht.
William Shakespeare | William Laud | William Blake | William | William III of England | William Morris | William McKinley | William Howard Taft | William Ewart Gladstone | William the Conqueror | William S. Burroughs | Fleetwood Mac | William Shatner | William Faulkner | Mac OS | William Randolph Hearst | William Wordsworth | William Tecumseh Sherman | William Hogarth | Prince William, Duke of Cambridge | William Penn | William Jennings Bryan | William Gibson | William Wilberforce | William James | Mac | William Makepeace Thackeray | Fort William | William Hanna | William Hague |
Before becoming Viscounts and Earls of Mayo, the senior branch of the family held the Gaelic title Mac William Íochtar and received the White Rod.