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
Mary Seymour, Duchess of Somerset Mary Seymour, Duchess of Somerset Mary Seymour, Duchess of Somerset (22 October 1697 – 1 February 1768), formerly Mary Webb, was the wife of Edward Seymour, 8th Duke of Somerset, and the mother of both the 9th and 10th dukes. Mary Webb was born at Seend, Wiltshire, the only child of Daniel Webb, of Monkton Farleigh, and his wife Elizabeth Somner, who was the daughter of John Somner of Seend. She married the duke, then Sir Edward Seymour (6th Baronet Seymour), on 8 March 1716 or 5 March 1717, at Monkton Farleigh. In December 1740, Seymour inherited his father's estates