Guillaume was born about 1155, the son of unknown parents. The place is not known.
He died in 1249. The place is not known.
His wife was Jeanne de Montrelais. They were married, but the date and place have not been found. Their two known children were Hamon II (c1170-c1220) and Jeanne (c1160-?).
| Event | Date | Details | Source | Multimedia | Notes |
|---|---|---|---|---|---|
| Birth | ABT 1155 |
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| Death | 1249 |
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