Robert III De Tesson 
Robert III De was born about 1090. Robert III De's father is Robert II De Tesson and his mother is Gersende Marmion. His paternal grandfather was Robert I De Tesson and his paternal grandmother is Hathemudis X. He is an only child.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.~ 1010
- b.~ 1040 d.1066 in Battle of Hastings
- b.~ 0942 in Germany
- b.~ 0969 in Courcy/Courcy, Ardennes, Champagne, France
- b.~ 1015
- b.0953 in Brienne, Normandy d.~ 1015
- b.~ 0980
- b.~ 0965 in Castle Guines, Artois/Pas-de-Calais, France
- b.~ 1060
- b.~ 1090
- b.~ 1070
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They have a daughter named Mathilde De.
