Guillaume was born about 1230, the son of Thibaut I de Rochefort and Emma de Donges. The place is not known.
He died after 1275. The place is not known.
His wife was Marquise de Châteaubriant. They were married, but the date and place have not been found. Their only known child was Thibaud II (c1260-c1332).
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Guillaume I de Rochefort |
Thibaut I de Rochefort |
Alain de Rochefort |
Jarnorgon de Rochefort |
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Anne de Rostrenen |
Riwallon II de Rostrenen |
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Theophanie de Lanvaux |
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Emma de Donges |
Rouaud III de Donges |
Éon de Donges |
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| Event | Date | Details | Source | Multimedia | Notes |
|---|---|---|---|---|---|
| Birth | ABT 1230 |
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| Death | AFT 1275 |
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| Attribute | Date | Description | Details | Source | Multimedia | Notes |
|---|---|---|---|---|---|---|
| Nobility Title | FROM 1271 TO 1275 | seigneur de Rochefort, de Châteauneuf-d'Ille-et-Vilaine, et d'Assérac | ||||
| Nobility Title | vicomte de Donges |
Note 1
marié probablement à l'héritière d'Assérac