Original: Frances Grey , Duchess of Suffolk ( 16 July 1517 -- 20 November 1559 ) , born Lady Frances Brandon , was the second child and eldest daughter of Charles Brandon , 1st Duke of Suffolk and Mary Tudor , dowager Queen of France .
Simplified: Lady Frances Brandon ( July 16 , 1517 -- November 20 , 1559 ) was the daughter of Mary Tudor of England ( 1495 -- 1533 ) and Charles Brandon , Duke of Suffolk .