- Born in 1100
- Deceased on September 15, 1146, at the approximate age of 45 years
Parents
- Étienne Ier de Penthièvre (1055 - 1137), comte de Guingamp
- Havoise de Blois, Havoise de Guingamp
Family
- Married in 1137, with Berthe de Bretagne, Berthe de Cornouaille (1114 - 1156), duchesse de Bretagne, issuing
