_, Burchard (of Avesnes) [-father of-] _
                                            |                                        
                       _Burchard ___________|
                      |                     |
                      |                     |________________________________________
                      |                                                              
 _John _______________|
| (.... - 1257) m 1246|
|                     |                      _Baldwin IX ____________________________+
|                     |                     | (.... - 1205)                          
|                     |_Margaret I _________|
|                       (.... - 1280)       |
|                                           |_Mary __________________________________
|                                                                                    
|
|--John II 
|  (.... - 1304)
|                                            ________________________________________
|                                           |                                        
|                      _____________________|
|                     |                     |
|                     |                     |________________________________________
|                     |                                                              
|_Aleidis ____________|
   m 1246             |
                      |                      ________________________________________
                      |                     |                                        
                      |_____________________|
                                            |
                                            |________________________________________