Seymour family V's visit to England in 1522. The eldest of his ten children was Edward Seymour, 1st Duke of Somerset, the famous Protector in the reign of Edward VI; his third son was Thomas Seymour, Baron Seymour of Sudeley; and his eldest daughter Jane was third wife of King Henry VIII, and mother of Edward VI. The Protector was married twice; and, probably owing to the adultery of his first wife whom he repudiated about 1535, his titles and estates were entailed first on the issue of his second marriage with Anne, daughter of Sir Edward Stanhope. The Protector's eldest surviving
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.