Catherine Seymour noblewoman; (died 1731) (1688–1731) Parents Elizabeth Seymour, Duchess of Somerset Charles Seymour, 6th Duke of Somerset Children Charles Wyndham, 2nd Earl of Egremont Elizabeth Wyndham Percy Wyndham-O'Brien, 1st Earl of Thomond Catherine Wyndham Siblings Algernon Seymour, 7th Duke of Somerset Catherine Seymour Elizabeth Seymour Anne Seymour Percy Seymour Charles Seymour, Earl of Hertford Lady Frances Seymour Charlotte Finch Partners Sir William Wyndham, 3rd Baronet