William Cavendish, 3rd Duke of Devonshire British nobleman and Whig politician (1698–1755) Parents Rachel Cavendish, Duchess of Devonshire William Cavendish, 2nd Duke of Devonshire Children Lord John Cavendish Lady Caroline Cavendish Lady Elizabeth Cavendish William Cavendish, 4th Duke of Devonshire Lady Rachel Cavendish Lord Frederick Cavendish Lord George Cavendish Siblings Lord James Cavendish Lord Charles Cavendish Lady Rachel Cavendish Lady Elizabeth Cavendish Henrietta Cavendish Partners Catherine Cavendish, Duchess of Devonshire
