Nicolas II de Saint-Omer, seigneur de Thèbes

• https://en.wikipedia.org/wiki/Nicholas_II_of_Saint-Omer

Nicholas II of Saint Omer was the lord of half of Thebes in Frankish Greece from 1258 to his death in 1294. From his two marriages he became one of the richest and most powerful barons of his time, building a splendid castle at Thebes as well as the Old Navarino castle. He also served as bailli of the Principality of Achaea on behalf of the Angevins of Naples between 1287 and 1289. ..

..Both his marriages were childless, and on his death in 1294, he was succeeded by his younger brother Otho.

-http://fmg.ac/Projects/MedLands/LATIN%20LORDSHIPS%20IN%20GREECE.htm...

a) NICOLAS de Saint-Omer (-1294). The late 13th century genealogy by Balduinus de Avennis names "Nicolaum, Ottonem et Joannem" as the three sons of "Bilas"[927]. The Livre de la Conqueste de la Morée names “messire Belas…de Saint Omer” as father of “ces trois freres de Saint Omer” (“le noble baron Jehan de Saint Omer, le frere monseignor Nicole de Saint Omer, le seignor de la moitié d Estives, et de messire Otthe”)[928]. The Livre de la Conqueste de la Morée names “messire Jehans et messire Othe de Sainct Omer” as brothers of “messire Nicolas de Saint Omer”[929]. He succeeded as NICOLAS II joint Lord of Thebes 1258-1294. He built the castle of St Omer on the Kadmeia, funded by the wealth of his first wife[930]. He was appointed Bailly of the principality of Achaia in 1287 by Robert Comte d'Artois, who was acting as regent for Charles II King of Sicily [Anjou-Capet] during the latter's imprisonment, in succession to Guillaume Duke of Athens, and served until King Charles's release in 1289 when Guy de Charpigny Lord of Vostitza was appointed in his place[931].

m firstly ([Naples 24 Jan 1278]) MARIE of Antioch, daughter of BOHEMOND VI Prince of Antioch & his wife Sibylle of Armenia (-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[932]. 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”[933].

m secondly ( [1279] ) as her second husband, AGNES [Anna] Komnenodukaina of Epirus Lady of Kalamata and Khlemutsi, widow of GUILLAUME II de Villehardouin Prince of Achaia, daughter of MIKHAEL [II] Komnenos Dukas Angelos Lord of Epirus & his wife Theodora Dukaina Petraliphaina Basilissa (-4 Jan 1286). Georgius Akropolites records the marriage of "Michaelis…filia sua Anna" and "Achaiæ principe"[934]. Georgius Phrantzes names "Manfredum Siculorum rege et principem Peloponnesi et Achaiæ" as the two sons-in-law of "Aetolorum et Epirotarum despota Michaele"[935]. The Livre de la Conqueste de la Morée records the marriage of “le prince Guillerme” and “la suer dou despot”[936]. The late 13th century genealogy by Balduinus de Avennis records that "Nicolaum", son of "Bilas", married "Achayæ principissam"[937]. She adopted the name AGNES. After her first husband died, she received the castles of Kalamata and Khlemutsi for life[938]. The Livre de la Conqueste de la Morée records that, after the death of Prince Guillaume, “la princesses a feme…suer…de Quir Niccifore” married “le baron monseignor Nicole de Saint Omer le veillart, li sires de la moitié d´Estives”[939].

so who are this unsourced, 2024 cutted off, Isabelle de Saint Omer ?