bef 1250 Marie married Alphonse de Brienne Comte d’Eu (3732) , son of Jean de Brienne Emperor of Constantinople (ca 1168-21 Mar 1237) & Berenguela de León (3303) (ca 1198-12 Apr 1237). Alphonse died on 13 Sep 1270 in Carthage. He died of the plague. Buried on 22 May 1271 in St. Martin Chapel, St.Denis Abbey.