Research Notes:

Otmond de Chaumont, I. du nom, dit le Vieux, vivoit en 1119, qu'il sut fait prisonnier à la bataille de Brenin, que lui & un grand nombre de ses parens conseillerent à Louis VI, Roi de France, de livrer à Henri I, Roi de Angleterre, ou ils se comporterent avec une si grande valeur, que les Anglois, au rapport d'Orderic Vitalis, les appellement Furibundi Calvimontenses. Cet Otmond, qui se rendit Religieux sur la fin de ses jours en l'Abbaye de Saint-Germer de Flaix, avoit épousé l'héritiere de Quitry, fille de Nicolas, Seigneur de Quitry, dont il eut...* ^{1 2}

* Note that Foundation for Medieval Genealogy, as well as other sources, show the daughter of Nicolas de Quitry as Otmond's mother rather than wife....

"Otmundus et utrique filii eius Willelmus et Otmundus" confirmed the donation of "ecclesiam...in villa...Chitrei" to found the priory of Saint-Wandrille made by “avus eorum Nicholaus” by undated charter, witnessed by “Rotbertus frater Otmundi...”. Orderic Vitalis records that, after the death of their father "Rodbertus Eloquens de Calvimonte, qui capitalis dominus erat", "filii eius Otmundus de Calvimonte et Waszo de Pexeio et Rotbertus Belvancensis" confirmed donations to "Sancto Ebrulfo", in a passage dated to [1066/89]. Orderic Vitalis names "Rodbertus...de Maldestorn et Odmundus de Calvimonte, Gualbertus de Burris et Ricardus frater eius, Godefredus et Petrus filii Herberti de Serranz, militæ Vilcassinorum" as defenders of Vexin against the English, dated to [1097]. "Otmundo ipsi castri domino, Roberto fratre eius, et Watho de Pissiaco...…" witnessed the charter dated 15 Oct 1098 “apud Calvum Montem” under which "Wiardus filius Drogonis de Coflente" renounced claims over “Ledonis Curtis” in favour of Chartres Saint-Père. "Osmundus de Calvo Monte" consented to the donation made by “Hugo de Marinis” of revenue from "molendino...in stagno...sub Calvo Monte" to “sancto Petro Ledonis Curie”, by charter dated to before 1112. “...Hothmundus de Calvomonte...” witnessed the charter dated 1112 under which Louis VI King of France confirmed the possessions of “Henricus...Lotheringus” in Paris.

The name of Osmond’s wife is not known. Depoin cites donations included in the cartulaire de Préaux made by "Osmundus cubicularius" his mother "Hadvide" and his three sons “Roger et Robert prêtres et Guillaume laïc”... ³