{W.H.Turton, "The Plantagenet Ancestry" (Balt.:Gen.Pub.Co.,1968), p. 15, gives Alix as Alice de Vexin, dau. of Raoul II
de Vexin and wife Adele de Breteuil. An article in French in essays edited by R. Allen Brown in "Anglo-Norman Studies
III, Proceedings of the Battle Conference on Anglo-Norman Studies, 1981" (article "Les comtes de Champagne et la
Normanitis semioloque d'ur tombeau" by Michael Bur) reports that Theobald married Gersent du Mans and they are parents
of Stephen Henry, Count of Blois, who died on Crusade in 1101.