William, Willie, Bill, or Billy Horne may refer to:

Politics

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Sports

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Others

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See also

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  • William Horn (1841–1922), Australian mining magnate, pastoralist, politician, author, sculptor and philanthropist
  • Will Horn, American baseball player of the 1900s
  • Bill Horn (born 1967), Canadian ice hockey player and coach
  • Billy Horn (born 1938), Scottish footballer
  • Sir William Whorne, Lord Mayor of London in 1487