Guillaume was the son of unknown parents. The date and place of his birth have not been found.
His wife was Mathilde de Beaumont. They were married, but the date and place have not been found. They had no known children.
| Attribute | Date | Description | Details | Source | Multimedia | Notes |
|---|---|---|---|---|---|---|
| Nobility Title | seigneur d'Ivry |
Note 1
son of Ascelin Goel, Lord of Ivri