William Bentinck, 4th Duke of Portland

William Henry Cavendish Cavendish-Scott-Bentinck, 4th Duke of Portland KG FRS FSA (24 June 1768 – 27 March 1854), styled Marquess of Titchfield until 1809, was a British politician who served in various positions in the governments of George Canning and Lord Goderich.

More information on the Wikipedia page.