William Cavendish

• William Cavendish (English politician, born 1783)
• William Cavendish (courtier)
• William Cavendish, 1st Duke of Devonshire
• William Cavendish, 1st Duke of Newcastle
• William Cavendish, 1st Earl of Devonshire
• William Cavendish, 2nd Baron Chesham
• William Cavendish, 2nd Duke of Devonshire
• William Cavendish, 2nd Earl of Devonshire
• William Cavendish, 3rd Duke of Devonshire
• William Cavendish, 3rd Earl of Devonshire
• William Cavendish, 4th Duke of Devonshire
• William Cavendish, 5th Duke of Devonshire
• William Cavendish, 6th Duke of Devonshire
• William Cavendish, 7th Duke of Devonshire
• William Cavendish, Earl of Burlington
• William Cavendish, Marquess of Hartington
• William Cavendish-Bentinck, 3rd Duke of Portland
• William Cavendish-Scott-Bentinck, 5th Duke of Portland
• William Hunter Cavendish