Jean was the son of unknown parents. The date and place of his birth have not been found.
His wife was Jeanne d'Avaugour. They were married, but the date and place have not been found. They had no known children.
| Attribute | Date | Description | Details | Source | Multimedia | Notes |
|---|---|---|---|---|---|---|
| Nobility Title | seigneur de Dangu et de Mauny |
Note 1
Jean Ier,seigneur de Dangu CRESPIN , sgr de Mauny 1268-1332 & Jeanne dite Tesson, dame de Thury BERTRAND , sgr de Thury )