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In page Marie, Duchess of Auvergne:

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All three of Marie's brothers were dead before 1400,[citation needed] which explains the complexity of the negotiations for her third marriage: she and her elder sister Bonne were to be heirs to John of Berry's titles, which required royal assent.[1][2] John of Berry died on 15 June 1416 (by which time Marie's husband was already a prisoner in England). Marie was accordingly appointed Duchess of Auvergne and Countess of Montpensier on 26 April 1418; these titles were confirmed in 1425. On 17 January 1421, her husband appointed her administrator of his estates as well.[citation needed] He died a prisoner in London in January 1434.[citation needed] Marie died in Lyon on an unknown date in June of the same year. She was buried at Souvigny Priory.[citation needed]