Jeanne Dreux de Bretagne was born 1296 to Arthur II de Bretagne (1262-1312) and Yolande de Montfort (1263-1323) and died 1364 of unspecified causes. She married Robert de Cassel (c1278-1331) 1323 JL .
Children
| Name | Birth | Death | Joined with |
| Jean de Cassel (-1332) | |||
| Yolande de Dampierre (1331-1395) | 15 September 1331 | 12 December 1395 | Henri IV de Bar (c1317-1344) |