Guillaume was the son of unknown parents. The date and place of his birth have not been found.
His wife was Esilie Crispin, who he married in ABT 1042. The place has not been found. Their only known child was Ernest (c1125-?).
| Attribute | Date | Description | Details | Source | Multimedia | Notes |
|---|---|---|---|---|---|---|
| Nobility Title | seigneur de Graville (Granville) |
Note 1
croisé de la première croisade à Jérusalem de 1096 à 1099