Guy was born about 1190, the son of Guy III de Mauvoisin and Aelis de Porhoët. The place is not known.
He died in 1252/53. The place is not known.
His wife was Julienne de Tillières. They were married, but the date and place have not been found. Their only known child was Guy V (c1245-1311).
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Guy IV de Mauvoisin |
Guy III de Mauvoisin |
Guillaume II de Mauvoisin |
Raoul de Mauvoisin |
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Brita |
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Adeline le Bosc |
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Aelis de Porhoët |
Eudon II de Bretagne |
Alain I de Porhoët |
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Villana de Castilla |
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Berthe I de Cornouaille |
Conan III de Cornouaille |
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Mathilde Fitz Roy |
| Event | Date | Details | Source | Multimedia | Notes | ||
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| Birth | ABT 1190 |
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| Death | 1252/53 |
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| Attribute | Date | Description | Details | Source | Multimedia | Notes |
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| Nobility Title | seigneur de Rosny |