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
Charles Seymour, 6th Duke of Somerset to the dukedom created for and forfeited by his own great-grandfather, Edward Seymour, 1st Duke of Somerset (executed 1552). Three years later, in 1678, Charles's brother, the 5th duke, was murdered in Italy, aged 20, unmarried and without progeny, having been shot at the door of his inn at Lerice. The 16-year-old Charles Seymour became the 6th duke and the 4th Baron Seymour of Trowbridge. In 1682, at the age of 20 he married a great heiress, the 15-year-old Lady Elizabeth Percy (1667–1722), daughter and sole heiress of Joceline Percy, 11th Earl of Northumberland (1644–1670), who brought him immense estates,