Constance De Penthievre 
Constance De was born about 1140. Constance De's father was Alain De+ Penthievre and her mother was Berthe I De+ Cornouaille. Her paternal grandfather was Etienne De+ Penthievre and her paternal grandmother is Hawise De+ Guincamp; her maternal grandfather was Conan III De+ Cornouaille and her maternal grandmother is Mathilde Maud Of+ England. She had two brothers named Conan IV De+ and Brian I De Penthievre+. She was the second oldest of the three children. She had a half-brother and a half-sister, named John De+ and Aelis De. She died after June 23rd, 1184.General Notes
SOURCES: "Ancestors/Descendants of Royal Lines" (Contributors: Manuel Abranches de Soveral, Reynaud de Paysac, H.R. Moser <Burke Peerage>), O.Guionneau, E. Polti, A.Terlinden <Genealogy of the existing British Peerage, 1842, and E. Lodge>)
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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.0944 in Bretagne, France d.29 JUN 992 in Conquereui
- b.~ 0980 in Bretagne, France d.20 Nov 1008 in Bretagne, France
- b.~ 0960 in Anjou, France d.27 JUN 992
- b.< 1009 in Penthievre, Bretagne, France d.07 Jan 1079
- b.28 AUG 933 in Fecamp, France d.20 NOV 996 in Fecamp, France
- b.~ 0980 in Normandy, France
- b.~ 0945 in Normandy, France d.1031 in France
- b.~ 1062 in Penthievre, Bretagne, France d.BET 21 APR 1135 AND 1137 in Quire, St. Mary, Yorkshire, England
- b.~ 0960
- b.0990 in Bretagne, France d.1058
- b.~ 1030 in Cornouaille, Ile-et-Vilaine, Bretagne, France
- b.~ 0960 d.1004
- b.~ 0998 in Nantes, Brittany, France d.1064
- b.~ 0975
- b.~ 1099 in Yorkshire, England d.15 Sep 1146
- b.~ 1067 in Guincamp, Bretagne, France
- b.~ 1140 d.>23 Jun 1184
- b.0990 in Bretagne, France d.1058
- b.~ 1030 in Bretagne, France d.13 Apr 1084
- b.~ 0998 in Nantes, Brittany, France d.1064
- b.~ 1067 in Nantes, Loie-Atlantique, Anjou/Pays de la Loire, France d.13 Oct 1119 in Redon
- b.~ 0996 in Bretagne (Brittany), France d.01 Oct 1040 in Vimoutiers, France
- b.~ 1040 d.> 1072
- b.> 1015 in Chartres, France d.13 Apr 1085
- b.1097 in Nantes, Loie-Atlantique, Anjou/Pays de la Loire, France d.17 Sep 1148
- b.< 1000 in Chateau Landon, Seine-et-Marne, France d.01 Apr 1046
- b.1043 in Anjou, France d.14 Apr 1109 in Anjou, France
- b.~ 1018 d.18 Mar 1076
- b.~ 1068 d.01 Jun 1146
- b.~ 1022 in Beaugency, France d.1096
- b.~ 1046 in Of, Beaugency, France
- b.~ 1025
- b.1119 in Brittany, France d.1157 in Richmond, Yorkshire, England
- b.~ 1003 in Normandy d.22 Jul 1035 in Nicea, Bithynia, Turkey
- b.14 Oct 1024 in Falaise, Normandy d.09 Sep 1087 in Hermenbraville, Rouen, Normandy
- b.~ 1003 in Falaise, Normandy
- b.1058 in Selby, Yorks, England according to one source d.01 Dec 1135 in St. Denis, Seine-St Denis, France
- b.1012 in Flanders, France d.01 Sep 1067 in Lille, Duchy of Lower
- b.1026 in Flanders d.02 Nov 1083 in Caen, Normandy
- b.1009 in France d.08 Jan 1079 in Monastaere De L'order De St. Benoist, France
- b.~ 1103 in England
- b.~ 1074
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‌Constance De and Alain III De were married in a religious ceremony after 1164. They had a son and a daughter, named Alain IV De and Constance De.
