Isabeau was the daughter of unknown parents. The date and place of her birth have not been found.
Her husband was Humbert de Beaujeu. They were married, but the date and place have not been found. Their only known child was Jeanne (?-1308).
| Attribute | Date | Description | Details | Source | Multimedia | Notes |
|---|---|---|---|---|---|---|
| Nobility Title | dame de Saint-Bris |
Note 1
fille de Guillaume II seigneur de Saint-Bris