Duke of Somerset years after losing his position as Lord Protector, his titles were forfeited and he was beheaded on 22 January 1552. He was replaced in the minority government of Edward VI by John Dudley, Duke of Northumberland, whose pragmatic style contrasted with Seymour's mixture of idealism and arrogance. In 1644 Charles I granted the earldom of Glamorgan to Edward Somerset (1613–1667). He was a descendant of Charles Somerset, the illegitimate son of Henry Beaufort, 3rd Duke of Somerset. In return for obtaining military help from Ireland he promised Edward the title of Duke of Somerset. Under the Commonwealth Edward was banished
Algernon Seymour, 7th Duke of Somerset Algernon Seymour, 7th Duke of Somerset General Algernon Seymour, 7th Duke of Somerset (11 November 1684 – 7 February 1750), styled Earl of Hertford until 1748, of Petworth House in Sussex, was a British soldier, politician and landowner. Seymour was the only son of Charles Seymour, 6th Duke of Somerset, by his first wife, the heiress Lady Elizabeth Percy, deemed Baroness Percy in her own right, the only surviving child of Joceline Percy, 11th and last Earl of Northumberland. Seymour was returned to Parliament for Marlborough in 1705, a seat he held until 1708, and then represented Northumberland until 1722.