Constance de Cornouaille
- Deceased in 1148
Parents
- Conan III de Bretagne, Conan de Cornouaille (1095 - 1148), duc de Bretagne
- Mathilde de Normandie, Mathilde d'Angleterre
Family
- Married with Geoffroi de Mayenne (c. 1147 - 1169), sieur de Mayenne, issuing