_Guy II of DAMPIERRE ______+
                                                  | (1155 - 1215)             
                        _William II DAMPIERRE ____|
                       | (1196 - 1231) m 1223     |
                       |                          |_Mathilde of BOURBON ______+
                       |                            (1165 - 1218)             
 _Guy DAMPIERRE _______|
| (1226 - 1304)        |
|                      |                           _Baldwin I FLANDERS _______+
|                      |                          | (1172 - 1205)             
|                      |_Margaret II of FLANDERS _|
|                        (1202 - 1279) m 1223     |
|                                                 |_Marie of BLOIS-CHAMPAGNE _+
|                                                   (1174 - 1204)             
|
|--Beatrice of DAMPIERRE 
|  (1260 - 1291)
|                                                  _William II of BÉTHUNE ___+
|                                                 | (.... - 1214) m 1190      
|                       _Robert VII BÉTHUNE _____|
|                      | (1201 - 1248)            |
|                      |                          |_Mathilda of DENDERMONDE __
|                      |                            (.... - 1224) m 1190      
|_Matilda of BÉTHUNE _|
  (.... - 1263)        |
                       |                           ___________________________
                       |                          |                           
                       |_Elisabeth of MORIALMEZ __|
                                                  |
                                                  |___________________________