_Robert V of BÉTHUNE __+
                                                      |                        
                            _William II of BÉTHUNE __|
                           | (.... - 1214) m 1190     |
                           |                          |_Adelaide of SAINT-POL _
                           |                                                   
 _William III of BÉTHUNE _|
| (.... - 1243)            |
|                          |                           ________________________
|                          |                          |                        
|                          |_Mathilda of DENDERMONDE _|
|                            (.... - 1224) m 1190     |
|                                                     |________________________
|                                                                              
|
|--William IV of BÉTHUNE 
|  (.... - 1255)
|                                                      ________________________
|                                                     |                        
|                           __________________________|
|                          |                          |
|                          |                          |________________________
|                          |                                                   
|_Elizabeth of ROESBRUGGE _|
                           |
                           |                           ________________________
                           |                          |                        
                           |__________________________|
                                                      |
                                                      |________________________