Thomas Seymour, 1st Baron Seymour of Sudeley
Thomas Seymour, Baron Seymour of Sudeley (c. 1508 – March 10, 1549), was a son of Sir John Seymour and Margaret Wentworth. He was a younger brother of Jane Seymour, the third Queen consort of King Henry VIII of England.
Seymour and Catherine Parr became romantically involved after the death of her second husband, but then King Henry took an interest in Catherine, and Seymour had to step aside, as the king sent him on a diplomatic mission. Catherine became Henry's sixth wife. After he died, she married Seymour in unseemly haste. She became pregnant, gave birth to daughter Mary, and died a few days later.
Thomas (the Lord High Admiral) and his brother Edward (the Lord Protector of England) wielded great power in England, through their nephew King Edward VI of England who was still a child when he came to the throne.
Thomas was overly ambitious and wanted to marry his nephew's half-sister Princess Elizabeth, later Elizabeth I of England. His sexual misconduct with her, while she lived with the Seymours, forced her stepmother Catherine to send her away for her own protection. Thomas was eventually executed for over-reaching in the power game; he had tried to wrest control of young King Edward VI from his brother Edward Seymour, and Edward Seymour had him executed.
Catherine's daughter Mary should have been a wealthy woman, but her mother had left her fortune to her husband. When Thomas was executed, the crown confiscated everything he had, including Catherine's bequest. The child appears to have died around the age of two, when she disappears from historical record.
Upon hearing of his death, Princess Elizabeth said, "today died a man with much wit and not much judgment." After almost being seduced by Thomas Seymour, Elizabeth learned to be much more careful in her interactions with men.