Ralph I of the Vexin
Biography
Rudolf is first mentioned in 915 in a royal diploma to the Saint-Clément monastery in Champagne. The following year, he became part of King Charles the Simple's entourage in Herstal. The chronicler Flodoard records him as being a follower of Duke Hugh the Great in 925, when he sealed a treaty with the Normans. He died in 926.Pierre Bauduin, The First Normandy (10th -11th centuries) 2004, p.474
Family
In 924 he married Hildegard, daughter and heiress of Count Ermenfroi of Vexin, Amiens and Valois. Ralph administered the counties on behalf of his wife.Édouard de Saint Phalle, "Les comtes de Gâtinais aux Xe et XIe siècle" in Onomastique et Parenté dans l'Occident médiéval, Oxford, Linacre College, Unit for Prosopographical Research, series Prosopographica et Genealogica / 3, 2000, pp. 230–246 ({{ISBN|1900934019}})
From Hildegard he had: