Isabelle was the daughter of Bertaut Barbou. She was married to Simon Marcel (son of Pierre Marcel). [1]
Sources
↑ Société de l'histoire de Paris et de l'Ile-de-France. Mémoires de la Société de l'histoire de Paris et de l'Ile-de-France. Tome XXX. p199-203. Paris, France: H. Champion, 1903.