Yves III De+ Beaumont-Sur-Oise 
Yves III De+ was born about 1040. Yves III De+'s father was Yves II De+ Beaumont-Sur-Oise and his mother is Emma+ X. His paternal grandfather is Yves I De+ Beaumont-Sur-Oise. He had a brother and a sister, named Eudes De+ and Adelais De+. He was the oldest of the three children. He died after 1083.General Notes
SOURCES: LDS FHL Ancestal File #
"Ancestors/Descendants of Royal Lines" (Contributors: Manuel Abranches de Soveral, Reynaud de Paysac, F.L. Jacquier <Genealogy of Lewis Carroll, Justin Swanstrom, The Royal Families of England Scotland & Wales by Burkes Peerage; Debrett's Peerage & Baronage; Table of descendants French Canadian Genealogical Society>, H.R. Moser <Burke Peerage>, L. Orlandini, O.Guionneau, L.B. de Rouge, E. Polti, A.Terlinden <Genealogy of the existing British Peerage, 1842>, L. Gustavsson, C. Cheneaux, E. Lodge, S. Bontron <Brian Tompsett>, R. Dewkinandan, C. Donadello) http://geneastar.org.
They had a son and a daughter, named Mathieu I De and Agnes De+.
