Charles Seymour, 6th Duke of Somerset the pride of birth and rank amounted almost to a disease". Charles was the second son of Charles Seymour, 2nd Baron Seymour of Trowbridge (died 1665), of Marlborough Castle in Wiltshire, by his wife Elizabeth Alington (1635–1692). The 2nd baron was (in a junior line) a great-great-grandson of Edward Seymour, 1st Duke of Somerset (executed 1552), brother of Queen Jane Seymour, uncle of King Edward VI and Lord Protector of England. Charles was educated at Harrow School and Trinity College, Cambridge, where his portrait by Nathaniel Dance-Holland survives in the College's collection. In 1675, Charles's elder brother Francis Seymour, 5th
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