Who married Marie, Duchess of Auvergne?

Marie de Berry (c. 1375 – June 1434) was suo jure Duchess of Auvergne and Countess of Montpensier in 1416–1434. She was the daughter of John, Duke of Berry, and Joanna of Armagnac. She was married three times. She acted as administrator of the Duchy of Bourbon for her third spouse 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, until 1434.

Louis III of Châtillon, Comte de Dunois (died 15 July 1391) was the son of Guy II of Blois-Châtillon and Marie of Namur.

On 29 May 1386, in Bourges, he married Marie, Duchess of Auvergne, daughter of John, Duke of Berry. However, they had no children, and his death left his father without heirs, causing him to sell Blois to Louis of Valois, Duke of Orléans.

Jean I. de Bourbon (* 1381; † 1434 in London) war ab 1410 ein Herzog von Bourbon, Herr von Mercœur und Graf von Forez. Er war ein Sohn Herzog Louis II. von Bourbon und der Anne d’Auvergne, Gräfin von Forez.