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
Duke of Somerset On his death without issue on 29 April 1675 only the Marquessate of Hertford became extinct. His distant cousin Francis Seymour, 3rd Baron Seymour of Trowbridge (1658–1678) became 5th Duke of Somerset. Francis was the eldest surviving son of Charles Seymour (1621–1665), whose father Sir Francis Seymour (c. 1590–1664), a younger brother of the 2nd Duke of Somerset, had been created Baron Seymour of Trowbridge in 1641. When the 5th Duke died unmarried in 1678, the title passed to his brother, Charles Seymour (1662–1748), youngest son of the 2nd Baron Trowbridge. The 6th Duke, was known as "the Proud Duke",