Marie, Duchess of Auvergne

Marie of Berry, suo jure Duchess of Auvergne, Countess of Montpensier was the daughter of John, Duke of Berry, and Joanna of Armagnac. She was married three times. She acted as administrator for her third husband John I, Duke of Bourbon, during his imprisonment in England after he was captured following the French defeat at the Battle of Agincourt in 1415.

Marie was born about the year 1375, the youngest daughter of John the Magnificent, Duke of Berry and Joanna of Armagnac. Through her father, a great collector of antiquities, art patron and bibliophile, she was a granddaughter of King John II of France. She had three brothers, Charles, Louis, and John and one older sister, Bonne.

Source: Wikipedia