Joan of Ponthieu | |
|---|---|
| suo jure Dame d'Épernon Countess of Vendôme and of Castres | |
| Born | before 1336 France |
| Died | 30 May 1376 |
| Noble family | Ivrea |
| Spouse(s) | Jean VI de Vendôme, Count of Vendôme and of Castres |
| Issue | Bouchard VII de Vendôme, Count of Vendôme and of Castres Catherine de Vendôme |
| Father | Jean II de Ponthieu, Count of Aumale |
| Mother | Catherine d'Artois |
Jeanne de Ponthieu, dame d'Épernon, Countess of Vendôme and of Castres, (Jeanne de Ponthieu, dame d'Épernon, comtesse de Vendôme et de Castres, before 1336 – 30 May 1376) better known in English as Joan of Ponthieu, was a French vassal; she was Dame d'Épernon suo jure by inheritance from 1343 to 1376. She was the youngest daughter of Jean II de Ponthieu, Count of Aumale. She was Countess of Vendôme and of Castres as the wife of Jean VI de Vendôme, Count of Vendôme and of Castres. She acted as regent for her infant granddaughter Jeanne, suo jure Countess of Vendôme from 1371 until the child's premature death in 1372.