Edward Seymour , 1st Duke of Somerset ( c. 1506 â `` 22 January , 1552 ) was an English peer and politician . Edward Seymour , 1st Duke of Somerset , 1st Earl of Hertford , 1st Viscount Beauchamp of Hache , KG , Earl Marshal ( c. 1506 -- 22 January 1552 ) was Lord Protector of England in the period between the death of Henry VIII in 1547 and his own indictment in 1549 .