Érard was the son of unknown parents. The date and place of his birth have not been found.
His wife was Marguerite de Vaudémont, who he married in AFT 1304. The place has not been found. They had no known children.
| Attribute | Date | Description | Details | Source | Multimedia | Notes |
|---|---|---|---|---|---|---|
| Nobility Title | sire de Nanteuil-la-Fosse |