Rodulfus Glaber records that Conan married the sister of Foulques of Anjou but does not name her.... She was presumably born before 965 if it is correct that her first child was born in 980. 1
Marriage Information:
Ermengarde married Conan I "Le Tort" de Rennes, duc de Bretagne, son of Judicaël (Juhael), comte de Rennes, and Gerberge, in 973. (Conan I "Le Tort" de Rennes was born in Rennes, Ille-et-Vilaine, Bretagne, France and died on 27 Jun 992 at the Battle of Conquereil, Pays de la Loire, France.)