Lady Mary Seymour was born in 1548 and was the daughter of Lady Jane Grey, England's nine-day queen, and Lord Guildford Dudley. After her parents were executed, she became an orphan at a young age. Mary was raised by her maternal grandmother, Lady Frances Brandon, and later by her aunt, Mary Tudor, who was the sister of King Henry VIII. Mary's life was marked by the political turmoil of the time. She was a potential heir to the English throne, but her status diminished as the years passed. Little is known about her later life, and she eventually faded from historical records.