Constance Bretagne

  Noted events in her life were:

• Web Reference: Charles Cawley's Medieval Lands, Geoffroy de Mayenne.
Geoffroy de Mayenne 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.

Constance married Geoffroy seigneur de Mayenne, son of Juhel de Mayenne and Clemence de Ponthieu. (Geoffroy seigneur de Mayenne died in 1169.)