William De Windsor 
William De was born in 1230 in Bradenlove, Buckshire, England. William De's father is William De Windsor and his mother is Agnes X. His paternal grandparents are William De Windsor and Edyth Plantagenet. He was an only child. He died at the age of 49 in 1279.General Notes
SOURCES: LDS FHL Ancestal File # (familysearch.org)
"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; Families of Monfort-sur-Risle & Bertrand de Bricquebec; The Dukes of Normandy, XXXXI, Paul Leportier, Claude Barret>, 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, H. de la Villarmois, C. Donadello; Scevole de Livonniere, H. de la Villarmois, I. Flatmoen)... http://geneastar.org.
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Ancestor Pedigree Chart
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*There are earlier generations for the ancestor(s) indicated. See their page(s) for details (click name)
- b.1068 in Pembrokeshire, Wales d.~ 1130
- b.~ 1100 d.~ 1160
- b.1072
- b.1132 in Bradenlove, Buckshire, England
- b.1158 in Stanwell, Middlesex, England
- b.~ 1135
- b.1189 in Hakeburn, Stanwell, Middlesex, England
- b.1162 in Peyton
- b.1230 in Bradenlove, Buckshire, England d.1279
- b.~ 1205
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They had a son named Richard De.