Isabeau was the daughter of unknown parents. The date and place of her birth have not been found.
Her husband was Jean II de Blondel de Joigny. They were married, but the date and place have not been found. Their only known child was Jean III (c1360-1415).
| Attribute | Date | Description | Details | Source | Multimedia | Notes |
|---|---|---|---|---|---|---|
| Nobility Title | dame de Méry |