Frances Darcy, Countess of Holderness English noblewoman (b. 1618) Parents Frances Seymour, Duchess of Somerset William Seymour, 2nd Duke of Somerset Children Siblings Lady Jane Seymour Lady Mary Seymour Henry Seymour, Lord Beauchamp Robert Seymour, Lord Beauchamp John Seymour, 4th Duke of Somerset William Seymour, Lord Beauchamp unknown Seymour Partners Richard Molyneux, 2nd Viscount Molyneux Thomas Wriothesley, 4th Earl of Southampton Conyers Darcy, 2nd Earl of Holderness