Geoffroy seigneur de Mayenne

  Noted events in his life were:

• Web Reference: Charles Cawley's Medieval Lands, Geoffroy de Mayenne.
"Juhello principe Meduane et uxore eius Clementia et filio eorum Gaufrido primogenito" subscribed a charter dated 12 and 26 Jul 1128, under which property was restored to the abbey of Mont-Saint-Michel [726]. He married, as his first wife and the mother of his daughter Clemence, Constance de Bretagne, daughter of Conan II duke of Brittany and Matilda, natural daughter of Henry I, king of England.

Geoffroy married Constance Bretagne, daughter of Conan Duc de Bretagne and Maud of England. (Constance Bretagne died in 1148.)