Guy IV De Mauvoisin 
Guy IV De was born about 1190. Guy IV De's father was Guy III De Mauvoisin and his mother was Aelis De Porhoet. His maternal grandparents were Eudes II De+ Porhoet and Berthe I De+ Cornouaille. He was an only child.General Notes
SOURCES: LDS FHL Ancestral File # (family search. org)
"Ancestors/Descendants of Royal Lines" (Contributors: Manuel Abranches de Soveral, Reynaud de Paysac, F.L. J P de Palmas <Aurejac et Tournemire; Frankish line; The Complete Peerage>, 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, , A. Brabant <"Dynastie Montmorency, Michel d'Herbigny>, Paul Leportier, Claude Barret>, H.R. Moser <Burke Peerage>, L. Orlandini, O.Guionneau, L.B. de Rouge, E. Polti, N. Danican <Britain's Royal Families; Buthlaw, Succession of Strathclyde, the Armorial 1961-62> 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, P. Ract Madoux <History of Morhange; Leon Maujean; Annuaire de Lorraine, 1926; La Galissonniere: Elections d'Arques et Rouen>), Jean de Villoutreys <ref: Georges Poull>E. Wilkerson-Theaux <Laura Little>, O. Auffray... 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.~ 1145 d.~ 1211
- b.~ 1190 d.BET 1252 AND 1253
- b.~ 1035 d.~ 1074
- b.< 1066
- b.~ 1080 in Of, Guillers, Morihan, France
- b.~ 1066 d.1092
- b.~ 1120 in Josselin, Morbihan, France d.> 1168
- b.~ 1100 in Brittainy, France
- b.~ 1150 d.~ 1235
- b.~ 1030 in Bretagne, France d.13 Apr 1084
- b.~ 1067 in Nantes, Loie-Atlantique, Anjou/Pays de la Loire, France d.13 Oct 1119 in Redon
- b.~ 1040 d.> 1072
- b.1097 in Nantes, Loie-Atlantique, Anjou/Pays de la Loire, France d.17 Sep 1148
- b.1043 in Anjou, France d.14 Apr 1109 in Anjou, France
- b.~ 1068 d.01 Jun 1146
- b.~ 1046 in Of, Beaugency, France
- b.1119 in Brittany, France d.1157 in Richmond, Yorkshire, England
- b.14 Oct 1024 in Falaise, Normandy d.09 Sep 1087 in Hermenbraville, Rouen, Normandy
- b.1058 in Selby, Yorks, England according to one source d.01 Dec 1135 in St. Denis, Seine-St Denis, France
- b.1026 in Flanders d.02 Nov 1083 in Caen, Normandy
- b.~ 1103 in England
- b.~ 1074
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He had a biological son named Guy V.