Guillaume was born in 1053, the son of Louis I de Faucigny and Thietburge von Rheinfelden. The place is not known.
He died in 1124. The place is not known.
His wife is not known. They were married, but the date and place have not been found. Their five known children were Rodolphe I (c1095->1131), Louis (?-?), Raymond (?->1135), Geraud (?-1129) and Amédée (?-c1125).
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Guillaume I de Faucigny |
Louis I de Faucigny |
Ermenraud de Faucigny |
Sigefroi de Faucigny |
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Michèle Colonna |
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Thietburge von Rheinfelden |
Rudolf I von Rheinfelden |
Kuno von Rheinfelden |
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Richilde von Öhningen |
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Thetberge |
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| Event | Date | Details | Source | Multimedia | Notes |
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| Birth | 1053 |
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| Death | 1124 |
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| Attribute | Date | Description | Details | Source | Multimedia | Notes |
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| Nobility Title | sire de Faucigny |