Guillaume was the son of unknown parents. The date and place of his birth have not been found.
He died before 1470. The place is not known.
His wife was Audette de la Valette. They were married, but the date and place have not been found. They had no known children.
| Event | Date | Details | Source | Multimedia | Notes |
|---|---|---|---|---|---|
| Death | BEF 1470 |
|
| Attribute | Date | Description | Details | Source | Multimedia | Notes |
|---|---|---|---|---|---|---|
| Nobility Title | seigneur de La Coste |
Note 1
Guillaume-Bertrand II damoiseau de GUISCARD , seigneur de La Coste †1453 & Marguerite de VAYRAC