Guillaume was the son of Josserand de la Guiche but his mother is unknown. The date and place of his birth have not been found.
He died after 1340. The place is not known.
His wife was Isabeau de Nanton. They were married, but the date and place have not been found. Their only known child was Jean (?->1390).
| Event | Date | Details | Source | Multimedia | Notes |
|---|---|---|---|---|---|
| Death | AFT 1340 |
|