_John LUXEMBOURG _________+
                                                 | (1370 - 1397)            
                           _Peter LUXEMBOURG ____|
                          | (1390 - 1433) m 1405 |
                          |                      |_Margaret of ENGHIEN _____
                          |                        (1365 - ....)            
 _Louis LUXEMBOURG _______|
| (1418 - 1475) m 1435    |
|                         |                       __________________________
|                         |                      |                          
|                         |_Margaret of BAUX ____|
|                           (1394 - 1469) m 1405 |
|                                                |__________________________
|                                                                           
|
|--Hélène of LUXEMBOURG 
|  (.... - 1488)
|                                                 _Henry MONTBÉLIARD ______+
|                                                | (1362 - 1397) m 1384     
|                          _Robert MONTBÉLIARD _|
|                         | (1390 - 1415)        |
|                         |                      |_Marie I of COUCY ________+
|                         |                        (1366 - 1404) m 1384     
|_Jeanne of MONTBÉLIARD _|
  (1415 - 1462) m 1435    |
                          |                       _Robert VIII of BÉTHUNE _+
                          |                      | (.... - 1408)            
                          |_Jeanne of BÉTHUNE __|
                            (1397 - ....)        |
                                                 |_Isabelle of GHISTELLES __