Bertrand was the son of unknown parents. The date and place of his birth have not been found.
His wife was Jeanne d'Harcourt, who he married in 1434. The place has not been found. They had no known children.
| Attribute | Date | Description | Details | Source | Multimedia | Notes |
|---|---|---|---|---|---|---|
| Nobility Title | baron de Chateaubriant |