(2 January 1717 – 2 January 1792) was the eldestson of Edward Seymour, 8th Duke of Somerset and his wife, the former Mary Webb.
He was also a baronet.
He was baptized on 27 January 1717 at Easton, Wiltshire.He died aged 74, unmarried and childless, and was interred on 11 January 1792 at Maiden Bradley, Warminster, Wiltshire.