Guillaume was born about 1300, the son of unknown parents. The place is not known.
His wife was Esclarmonde de Polier. They were married, but the date and place have not been found. Their only known child was Catherine (c1330-1387).
| Event | Date | Details | Source | Multimedia | Notes |
|---|---|---|---|---|---|
| Birth | ABT 1300 |
|
| Attribute | Date | Description | Details | Source | Multimedia | Notes |
|---|---|---|---|---|---|---|
| Nobility Title | seigneur de Bessière |