English duchesses by marriage

Mary Tudor (; 18 March 1496 – 25 June 1533) 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.
Following Louis's death, Mary married Charles Brandon, 1st Duke of Suffolk. Performed secretly in France, the marriage occurred without the consent of Mary's brother Henry VIII. The marriage necessitated the intervention of Thomas Wolsey; Henry eventually pardoned the couple after they paid a large fine. Mary had four children with Suffolk. Through her older daughter, Frances, she was the maternal grandmother of Lady Jane Grey, the de facto queen of England for nine days in July 1553.

Frances Helen Manners, Duchess of Rutland (née Sweeny; 19 June 1937 – 21 January 2024) was a British peeress and socialite. The wife of Charles Manners, 10th Duke of Rutland, following his death in 1999, she was known as the Dowager Duchess of Rutland.

Frances Grey, Duchess of Suffolk (née Lady Frances Brandon; 16 July 1517 – 20 November 1559), 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 (10 July 1553 – 19 July 1553), as well as Lady Katherine Grey and Lady Mary Grey.

Elizabeth of York, Duchess of Suffolk also known as Elizabeth Plantagenet (22 April 1444 – c. 1503) was the sixth child and third daughter of Richard Plantagenet, 3rd Duke of York (a great-grandson of King Edward III) and Cecily Neville. She was thus a sister of kings Edward IV and Richard III.