Constance was born about 1140, the daughter of Alain III de Penthièvre and Berthe I de Cornouaille. The place is not known.
She died after 23 JUN 1184. The place is not known.
She had two marriages/partners. Her first husband was Guillaume Plantagenêt, who she married in ABT 1155. The place has not been found. They had no known children.
Her second husband was Alain III de Rohan, who she married in AFT 1164. The place has not been found. Their only known child was Alain IV (1166-1205).
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Constance de Bretagne |
Alain III de Penthièvre |
Étienne I de Penthièvre |
Éon I de Bretagne |
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Havoise de Guingamp |
Thibaut de Blois |
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Adèle de Crépy |
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Berthe I de Cornouaille |
Conan III de Cornouaille |
Alain IV de Bretagne |
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Ermengarde d'Anjou |
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Mathilde Fitz Roy |
Henri I de Normandie |
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| Event | Date | Details | Source | Multimedia | Notes |
|---|---|---|---|---|---|
| Birth | ABT 1140 |
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| Death | AFT 23 JUN 1184 |
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| Attribute | Date | Description | Details | Source | Multimedia | Notes |
|---|---|---|---|---|---|---|
| Nobility Title | dame de Mur, de Poher et de Corlay |