_Robert I MONTBÉLIARD ___+
                                                  | (1344 - 1411)            
                        _Henry MONTBÉLIARD ______|
                       | (1362 - 1397) m 1384     |
                       |                          |_Marie of VALOIS _________+
                       |                            (1344 - 1404)            
 _Robert MONTBÉLIARD _|
| (1390 - 1415)        |
|                      |                           _Enguerrand VII of COUCY _+
|                      |                          | (1340 - 1396)            
|                      |_Marie I of COUCY ________|
|                        (1366 - 1404) m 1384     |
|                                                 |_Isabel PLANTAGENET ______+
|                                                   (1332 - 1379)            
|
|--Jeanne of MONTBÉLIARD 
|  (1415 - 1462)
|                                                  _Jean I of BÉTHUNE ______+
|                                                 | (.... - 1378)            
|                       _Robert VIII of BÉTHUNE _|
|                      | (.... - 1408)            |
|                      |                          |_Jeanne of COUCY _________+
|                      |                                                     
|_Jeanne of BÉTHUNE __|
  (1397 - ....)        |
                       |                           __________________________
                       |                          |                          
                       |_Isabelle of GHISTELLES __|
                                                  |
                                                  |__________________________