Marie de Poitiers, of Antioch

-https://fmg.ac/Projects/MedLands/ANTIOCH.htm#MarieMNicolasSaintOmer...

d) MARIE of Antioch (-before 1280). The Lignages d'Outremer name (in order) "Beymont, Ysabeau, Marie et Lucie" as the four children of "Beymont" & his wife, stating that Marie married "Nicole de Saint Omer" and died without heirs[402]. The Livre de la Conqueste de la Morée records that “la princesse d’Antioche” was the first wife of “le baron monseignor Nicole de Saint Omer le veillart, li sires de la moitié d’Estives”[403].

m ([Naples 24 Jan 1278]) as his first wife, NICOLAS de Saint-Omer Lord of Thebes, son of BELA de Saint-Omer joint Lord of Thebes & his wife Bonne de la Roche-sur-Oignon co-heiress of Thebes (-1294). Bailli of Moraia 1287/89.