High Quality Content by WIKIPEDIA articles! Edward Adolphus Seymour (later St. Maur), 12th Duke of Somerset, etc. KG, PC (Piccadilly, London, 20 December 1804 or 1805 – Stover Lodge, nr Torquay, 28 November 1885), styled Baron Seymour until 1855, was a British Whig aristocrat and politician, who served in various cabinet positions in the mid-19th century.