William Douglas

Earls and Dukes of Queensberry

• William Douglas, 1st Earl of Queensberry, Scottish nobleman
• William Douglas, 1st Duke of Queensberry, Scottish nobleman and politician, grandson of the above
• William Douglas, 4th Duke of Queensberry, Scottish nobleman, great-grandson of the above

  Earls of Angus

• William Douglas, 2nd Earl of Angus, Scottish nobleman and soldier, grandson of the 1st Earl of Douglas
• William Douglas, 9th Earl of Angus, Scottish nobleman and supporter of Mary, Queen of Scots
• William Douglas, 10th Earl of Angus, Scottish nobleman, son of the above
• William Douglas, 1st Marquess of Douglas and 11th Earl of Angus, Scottish nobleman, son of the above

  Earls of Douglas

• William Douglas, 1st Earl of Douglas, Scottish nobleman, grandson of William le Hardi, Lord of Douglas
• William Douglas, 6th Earl of Douglas, Scottish nobleman
• William Douglas, 8th Earl of Douglas, Scottish nobleman, cousin of the above

  Earls of Morton

• William Douglas, 6th Earl of Morton, Scottish nobleman
• William Douglas, 7th Earl of Morton, Scottish nobleman, grandson of the above

  Lords of Douglas

• William I, Lord of Douglas, medieval nobleman of Flemish origin
• William Longleg, Lord of Douglas, Scoto-Norman nobleman, grandson of the above
• William le Hardi, Lord of Douglas, Scottish soldier and governor of Berwick Castle, son of the above
• William IV, Lord of Douglas, Scottish nobleman, grandson of the above

  Other nobles and knights

• William Douglas, Lord of Liddesdale, Scottish nobleman and soldier, cousin of the 1st Earl of Douglas
• Sir William Douglas of Nithsdale, Scottish knight
• Sir William Douglas of Drumlanrig, Scottish knight, grandson of the 1st Earl of Douglas
• Sir William Douglas of Glenbervie, Scottish knight killed at the Battle of Flodden
• William Douglas, 2nd Lord Mordington, Scottish nobleman, grandson of the 10th Earl of Angus
• Sir William Douglas of Kelhead, Scottish Covenanter colonel, son of the 1st Earl of Queensberry
• William Hamilton, Duke of Hamilton, Scottish nobleman and politician, son of the 1st Marquess of Douglas
• William Douglas, 14th of Cavers , Scottish landowner and politician, MP for Roxburghshire 1715–22, 1727–34, 1742–47, and for Dumfries Burghs 1722–27
• Sir William Douglas, 4th Baronet, Scottish landowner and politician, MP for Dumfries Burghs, great-great-grandson of Sir William Douglas of Kelhead
• Sir William Douglas, 1st Baronet, Scottish mill owner, landowner and founder of Castle Douglas
• Lord William Douglas, Scottish politician and landowner, son of Sir William Douglas, 4th Baronet

  Arts

• William Douglas , Scottish writer, probable author of the poem "Annie Laurie"
• William Douglas , Scottish miniature and portrait painter
• Sir William Fettes Douglas, Scottish painter
• Billy Douglas , American jazz trumpeter and vocalist
• Bill Douglas, Scottish film director
• Bill Douglas , Canadian composer, pianist and bassoonist

  Law

• William O. Douglas, United States Supreme Court justice
• Sir William Randolph Douglas, Chief Justice of Barbados

  Military

• William Douglas of Kirkness, Scottish general and politician
• William Douglas , American military officer during the American Revolutionary War
• Sir William Douglas , British Army general in the War of 1812
• Sir William Douglas of Balgillo, British Army officer during the Napoleonic Wars
• William Bloomfield Douglas, Royal Navy officer and colonial official
• Sir William Douglas , British Army general in the First World War
• Sholto Douglas, 1st Baron Douglas of Kirtleside, Marshal of the Royal Air Force

  Politics

• William Lewis Douglas, governor of Massachusetts, 1905–1906
• William Douglas , member of the Legislative Assembly of New Brunswick, 1886–1892
• William H. Douglas, U.S. Representative from New York
• Billy Douglas , unionist activist from Northern Ireland
• William Douglas , Orangeman and Assembly member

  Sports

• William Douglas , New Zealand cricketer
• Billy Douglas , Welsh rugby union player
• William Douglas , Scottish footballer for Newton Heath and Blackpool
• William Douglas , Scottish footballer for Queen's Park
• Bill Douglas , Australian rugby union player
• William Douglas , New Zealand cricketer
• William Douglas , Scottish footballer for Montrose, Brechin City, Blackburn Rovers, Dick, Kerr's XI and Rochdale in the 1930s
• William Douglas , American boxer

  Others

• William Douglas , Scottish and American maritime fur trader
• William Douglas , Church of England priest, Archdeacon of Wilts, 1799–1804
• William Douglas , Scottish advocate and Member of Parliament for Plympton Erle, 1812–1816
• William O. Douglas, American who in 1878 received a patent for a lenticular truss bridge

  Fictional characters

• Billy Douglas , fictional character on the American television series ''One Life to Live''