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Bertha de Blois was born circa 1015 in Blois, Loir-et-Cher, Centre, France to Odo II de Blois (c983-1037) and Irmengarde d'Auvergne (c995-1040) and died 11 April 1085 in Chartres, Ile-et-Vilaine, Bretagne, France of unspecified causes. She married Alain III de Bretagne (997-1040) 1018 JL . She married Hugues IV du Maine (c1006-1051) 14 May 1046 JL . Notable ancestors include Charlemagne (747-814), Alfred the Great (849-899). Ancestors are from France, the United Kingdom, Germany, Belgium.


Offspring of Bertha de Blois and Alain III de Bretagne (997-1040)
Name Birth Death Joined with
Conan II de Bretagne (1030-1066) 1033 11 December 1066
Havoise de Bretagne (1027-1072) 1027 1072 Hoël de Cornouaille (c1027-1084)

Offspring of Bertha de Blois and Hugues IV du Maine (c1006-1051)
Name Birth Death Joined with
Marguerite du Maine (c1045-1063) 1045 1063
Herbert II du Maine (c1048-1062) 1048 1062


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