Guillaume I De Montagu 
Guillaume I De was born in 1222. Guillaume I De's father was Eudes I De Bourgogne+ Montagu and his mother was Elizabeth De+ Courtenay. His paternal grandparents were Alexander I De+ Bourgogne and Beatrice De+ Rion; his maternal grandparents were Pierre II De+ Courtenay and Yolande De+ Hainaut. He had two brothers named Alexandre II De+ and Philippe De. He was the second oldest of the three children. He died at the age of 78 in 1300.General Notes
SOURCES: LDS FHL Ancestral File # (familysearch.org)
WEB:
"Ancestors/Descendants of Royal Lines" (Contributors: F. L. Jacquier (History of Charlemagne by Christian Settipani); L. Orlandini, 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), 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, A. Brabant (Genealogy of Chauvigny of Blot from "Chanoine Prevost Archiviste du Diocese de Troyes Union Typographique Domois Cote-d'Or 1925), Emmanuel Arminjon (E Levi-Provencal Histoire de l'Espagne Andalouse), Y. Gazagnes-Gazanhe, R. Sekulovich and J.P. de Palmas ("notes pierfit et iconographie Insecula", Tournemire), H de Riberolles (Base Tournemire), Franck Veillon; ,(Histoire Généalogique de la Maison de Hornes, Bruxelles 1848; Notice Historique Sur L'Ancien Comté de Hornes, Gand 1850; Europäische Stammtafeln, Marburg 1978); E.Driant / "La Maison de Damas" par Hubert Lamant, 1977 (Bibliothèque municipale d'Eaubonne)
........... 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.1085 in Of, Bourgogne, France d.1143
- b.~ 1120 in Of, Bourgogne, France d.27 Sep 1162
- b.~ 1092 in Of, Mayenne, France d.1162 in Beaune, France
- b.> 1147 in Bourgogne, France d.25 Aug 1192 in Tyrus, Jerusalem
- b.~ 1078 in Blois, Loir-et-Cher, Orleanais/Centre, France d.08 Jan 1152 in Lagny-sur-Marne, Seine-et-Marne, Ile-de-France, France
- b.~ 1128 in Of, Champagne, France d.17 Aug 1190
- b.~ 1105 in Carthinia (Karnten), Austria d.13 Dec 1160
- b.1170 d.1205
- b.< 1088 d.1139
- b.~ 1110 d.1176
- b.~ 1090 d.1158
- b.~ 1152 d.1200
- b.~ 1090 d.1147
- b.~ 1123 d.~ 1195
- b.~ 1102 in Bavaria d.22 Feb 1130
- b.1196 in Montagu, France d.BET 1243 AND 1247
- b.~ 1175 d.> 1221
- b.1222 d.1300
- b.1052 in Reims, Champagne, France d.29 Jul 1108 in Meulan, Isle de France
- b.1081 in Paris, Seine, Ile-de-France, France d.01 Aug 1134 in Chateau De Bethizy, Paris, Isle De France
- b.~ 1056 in Vlaardingen, Zuid-Holland, Netherlands d.1094 in Montreuil-sur-Mer, France
- b.BET 1126 AND 1128 in Reims, Champagne, France d.1183 in Palestine, Israel
- b.~ 1062 in Maurienne, Savoie, Rhone-Alpes, France d.18 Sep 1103 in DOD per one source
- b.1086 in Maurienne, Savoie, Rhone-Alpes, France
- b.~ 1068 in Bourgogne, France d.1133
- b.~ 1167 in Courtenay, Galinois, France d.1217 in Epirus, Turkey
- b.~ 1078
- b.~ 1105 d.~ 1190
- b.~ 1090
- b.~ 1128 in Courtenay, Galinois, France d.14 Sep 1206
- b.~ 1110
- b.1199 in Constantinople, Turkey d.> 1269
- b.1088 in Of, Hainaut, France d.1120
- b.1108 in Mons, Hainaut, Belgium d.08 Nov 1171
- b.1089 in Wassemberg. Rheinland, Prussia
- b.1152 in Hainaut, Belgium d.17 Dec 1195 in Mons, Hainaut, Belgium
- b.~ 1066 d.19 Aug 1139
- b.~ 1119 in Namur, Namur, Belgium d.Nov 1168
- b.~ 1081
- b.1175 in Flanders, Belgium d.26 Aug 1219 in Constantinople, Turkey
- b.BET 1044 AND 1055 in Lorraine, France d.23 Jan 1115 in Alternate death date
- b.1099 in Alsace, France d.17 Jan 1168
- b.~ 1070 d.1117
- b.~ 1155 in Of, Alsace, France d.15 Nov 1194
- b.1092 in Anjou, France d.10 Nov 1143 in Jerusalem, Israel
- b.~ 1116 in Anjou, France d.BET 1165 AND 1167
- b.1096 in Maine, France d.1126 in Maine, France
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Guillaume I De and Jacquette De were married in a religious ceremony about 1249. They had a son named Alexandre III De.
Guillaume I De and Marie De were married in a religious ceremony in 1263. They had a son named Eudes II De.