Isabeau was the daughter of unknown parents. The date and place of her birth have not been found.
Her husband was Pierre de Fiennes du Bois. They were married, but the date and place have not been found. Their three known children were Marguerite (?-?), Charlotte (?-?) and Pierre (?-?).
| Attribute | Date | Description | Details | Source | Multimedia | Notes |
|---|---|---|---|---|---|---|
| Nobility Title | dame de Villers sur Auxy |