_John I NASSAU-SIEGEN __+
                                                          | (1340 - 1416) m 1357   
                            _Englebert I NASSAU-SIEGEN ___|
                           | (1370 - 1442)                |
                           |                              |_Margareta of LA MARCK _
                           |                                (1409 - ....) m 1357   
 _John IV NASSAU-SIEGEN ___|
| (1410 - 1474)            |
|                          |                               ________________________
|                          |                              |                        
|                          |_Johanna VAN POLANEN _________|
|                            (1391 - 1445)                |
|                                                         |________________________
|                                                                                  
|
|--Anna of NASSAU-SIEGEN 
|  (1441 - 1514)
|                                                          ________________________
|                                                         |                        
|                           _John II LOON ________________|
|                          |                              |
|                          |                              |________________________
|                          |                                                       
|_Maria of LOON-HEINSBERG _|
  (1426 - 1502)            |
                           |                               ________________________
                           |                              |                        
                           |_Margaret of SOLMS-BRAUNFELS _|
                                                          |
                                                          |________________________