Lady Mary Butler (1646-1710) (1646–1710) Parents Elizabeth Butler James Butler, 1st Duke of Ormonde Children William Cavendish, 2nd Duke of Devonshire Elizabeth Cavendish Lord James Cavendish Lord Henry Cavendish Siblings Elizabeth Stanhope, Countess of Chesterfield John Butler, 1st Earl of Gowran Thomas Butler, 6th Earl of Ossory Thomas Butler, Viscount Thurles Richard Butler, 1st Earl of Arran Partners William Cavendish, 1st Duke of Devonshire
