Bertrand was the son of Olivier II de Dinan and Agnorie de Penthièvre. The date and place of his birth have not been found.
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Olivier II de Dinan |
Geoffroy I de Dinan |
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Cana de Châteauganne |
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Radegonde de Château-Giron |
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Agnorie 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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