Prince William Augustus (26 April 1721 [N.S.] – 31 October 1765), was a younger son of George II of Great Britain and Caroline of Ansbach, and Duke of Cumberland from 1726. He is generally best remembered for his role in putting down the Jacobite Rising at the Battle of Culloden in 1746, which success made him immensely popular throughout Britain (for example, he received an honorary doctorate from the University of Glasgow). At present, however, he is regularly referred to by the nickname given to him by his English Tory opponents: "Butcher" Cumberland. Despite Culloden, he had a largely unsuccessful military career, and following the Convention of Klosterzeven in 1757, he never held active military command, and switched his attentions to politics and horse racing.
Duke of Cumberland is a peerage title that was conferred upon junior members of the British Royal Family, named after the county of Cumberland.