Born: Nantes, Loire-Atlantique, Anjou/Pays-de-la-Loire, France
Married:
Died: 1148
Research Notes:
Constance is shown in Europäische Stammtafeln as the younger daughter of Duke Conan III, died 1148. The primary source which confirms her parentage and marriage has not yet been identified.... 1
Marriage Information:
Constance married Seigneur Geoffroy III DE MAYENNE, son of Seigneur Juhel I DE MAYENNE and Clémence DE PONTHIEU. (Geoffroy III DE MAYENNE died on 18 Feb or 25 Jul 1169.)
Research Notes: