Frances Seymour

• Frances Stewart, Duchess of Lennox, wife of Edward Seymour, 1st Earl of Hertford
• Frances Seymour, Duchess of Somerset, wife of William Seymour, 2nd Duke of Somerset
• Frances Darcy, Countess of Holderness, daughter of the above, previously Viscountess Molyneux and Countess of Southampton
• Frances Seymour, Lady Hungerford, daughter of Charles Seymour, 2nd Baron Seymour of Trowbridge
• Frances Seymour, Duchess of Somerset (1699–1754), wife of Algernon Seymour, 7th Duke of Somerset
• Frances Ford Seymour, Canadian-American socialite, second wife of Henry Fonda and mother of Jane and Peter Fonda