Isaac was the son of unknown parents. The date and place of his birth have not been found.
His wife was Mahaut de Rumigny. They were married, but the date and place have not been found. They had no known children.
| Association | Relationship |
|---|---|
| Jean I de Barbançon (seigneur de Barbançon, de la Buissière et de Jeumont-en-Merbes-le-Château) | g-g-grandson |