Bonabes was the son of Noël de Derval and Marie de Rostrenen. The date and place of his birth have not been found.
His wife was Eustaice. They were married, but the date and place have not been found. Their only known child was Guillaume I (?-?).
| Attribute | Date | Description | Details | Source | Multimedia | Notes |
|---|---|---|---|---|---|---|
| Nobility Title | seigneur de Derval |