Constance de Bretagne (-1148)

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Constance Cornouaille de Bretagne was born on an unknown date to Conan III de Bretagne (1095-1148) and Maud FitzRoy (c1091-) and died 1148 in France of unspecified causes. She married Alan la Zouche (c1093-1150) . She married Geoffroy de Mayenne (c1126-1169) . Notable ancestors include Charlemagne (747-814), Alfred the Great (849-899), William I of England (1027-1087), Hugh Capet (c940-996). Ancestors are from England, France, the United Kingdom, Belgium, Germany, Netherlands.


Offspring of Constance de Bretagne and Geoffroy de Mayenne (c1126-1169)  ¢
Name Birth Death Joined with
Mathilde de Mayenne (c1145-)
Clemence de Mayenne (c1147-bef1209) 1147 1209 Robert IV de Sablé (c1132-aft1200)

Sources and notes

‡ General
  • No certainty that she married Alan la Zouche. Her complete entry in Medieval Lands (noted below) says "CONSTANCE de Bretagne (-1148). The primary source which confirms her parentage and marriage has not yet been identified. m as his first wife, GEOFFROY de Mayenne, son of JUHEL Sire de Mayenne & his wife Clémence de Ponthieu (-18 Feb or 25 Jul 1169)."
2 Wedding 2
¢2 Children 2


  Robin Patterson

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