Isabelle was the daughter of Juhaël III de Mayenne and Gervaise de Vitré. The date and place of her birth have not been found.
She died in 1256. The place is not known.
She had two marriages/partners. Her first husband was Dreux V de Mello. They were married, but the date and place have not been found. They had no known children.
Her second husband was Louis I de Sancerre, who she married in 1250. The place has not been found. They had no known children.
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Isabelle de Mayenne |
Juhaël III de Mayenne |
Geoffroy III de Mayenne |
Juhaël II de Mayenne |
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Clémence de Ponthieu |
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Isabelle de Meulan |
Galéran IV de Meulan |
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Agnès de Montfort |
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Gervaise de Vitré |
Alain de Vitré |
Robert III de Vitré |
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Anne de Dinan |
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Clémence de Fougères |
Guillaume de Fougères |
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Agathe du Hommet |
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| Event | Date | Details | Source | Multimedia | Notes |
|---|---|---|---|---|---|
| Death | 1256 |
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| Attribute | Date | Description | Details | Source | Multimedia | Notes |
|---|---|---|---|---|---|---|
| Nobility Title | de Mayenne et Dinan-Bécherel |