- Born in 1138
- Deceased on February 20, 1171, at the approximate age of 32 years
- Burial at Abbaye de Bégard
Parents
- Alain III de Penthièvre, le Noir (1100 - 1146), chevalier, Earl de Richmond
- Berthe de Bretagne, Berthe de Cornouaille (1114 - 1156), duchesse de Bretagne
Family
- Married in 1160, with Margaret of Scotland, Marguerite d'Ecosse (1143 - 1201), issuing
Constance (1161 - 1201)- Marguerite