Thomas Seymour, 1st Baron Seymour of Sudeley brother of English queen Jane Seymour (1508–1549) (1508–1549) Parents Margery Wentworth John Seymour Children Mary Seymour Siblings Edward Seymour, 1st Duke of Somerset Henry Seymour Jane Seymour Elizabeth Seymour, Lady Cromwell Dorothy Seymour Sir John Seymour Partners Catherine Parr