Frances Grey, Duchess of Suffolk, was an English noblewoman. She was the second child and eldest daughter of King Henry VIII's younger sister, Princess Mary, and Charles Brandon, 1st Duke of Suffolk. She was the mother of Lady Jane Grey, de facto Queen of England and Ireland for nine days, as well as Lady Katherine Grey and Lady Mary Grey.

Mary Tudor was an English princess who was briefly Queen of France as the third wife of King Louis XII. Louis was more than 30 years her senior. Mary was the fifth child of Henry VII of England and Elizabeth of York, and the youngest to survive infancy.