William Bentinck, 4th Duke of Portland references on wikipedia
William_Bentinck,_4th_Duke_of_Portland William Henry Cavendish Cavendish-Scott-Bentinck, 4th Duke of Portland PC (24 June 1768 27 March 1854) was a British politician who served in various positions in the governments of George Canning and Lord Goderich.He was the eldest son of William Cavendish-Bentinck, 3rd Duke of Portland and Dorothy Cavendish.