Lieutenant-Colonel Lord Edward Cavendish MP (28 January 1838 – 18 May 1891) was a 19th-century British politician, soldier, and nobleman. Born in Marylebone, Cavendish was the third son of William Cavendish, 7th Duke of Devonshire, by his wife, Lady Blanche Howard (a daughter of the 6th Earl of Carlisle and a niece of the 6th Duke of Devonshire). His father and his two surviving brothers were all Members of Parliament (MPs): his eldest brother Spencer, MP for North Lancashire 1857–91 and later 8th Duke of Devonshire, led the Liberal Party and was asked three times to be Prime Minister by Queen Victoria; the middle brother, Frederick was MP for the West Riding and Chief Secretary for Ireland and was assassinated in 1882.