Lady Frances Seymour (1728-1761) (1728–1761) Parents Charles Seymour, 6th Duke of Somerset Charlotte Seymour, Duchess of Somerset Children John Manners, Lord Roos Lord Robert Manners Frances Manners unknown daughter Manners Charles Manners, 4th Duke of Rutland Siblings Charlotte Finch Elizabeth Seymour Catherine Seymour Anne Seymour Percy Seymour Catherine Seymour Algernon Seymour, 7th Duke of Somerset Charles Seymour, Earl of Hertford Partners John Manners, Marquess of Granby