Henry Seymour, Lord Beauchamp English nobleman (1626–1654) Parents William Seymour, 2nd Duke of Somerset Frances Seymour, Duchess of Somerset Children William Seymour, 3rd Duke of Somerset Lady Elizabeth Seymour Siblings Lady Jane Seymour John Seymour, 4th Duke of Somerset Lady Mary Seymour Frances Darcy, Countess of Holderness Robert Seymour, Lord Beauchamp William Seymour, Lord Beauchamp unknown Seymour Partners Mary Somerset, Duchess of Beaufort