_William II DAMPIERRE ____+
                                             | (1196 - 1231) m 1223     
                       _Guy DAMPIERRE _______|
                      | (1226 - 1304)        |
                      |                      |_Margaret II of FLANDERS _+
                      |                        (1202 - 1279) m 1223     
 _William DAMPIERRE __|
| (1250 - 1311)       |
|                     |                       _Robert VII BÉTHUNE _____+
|                     |                      | (1201 - 1248)            
|                     |_Matilda of BÉTHUNE _|
|                       (.... - 1263)        |
|                                            |_Elisabeth of MORIALMEZ __
|                                                                       
|
|--Guy IV DAMPIERRE 
|  (1286 - 1345)
|                                             __________________________
|                                            |                          
|                      ______________________|
|                     |                      |
|                     |                      |__________________________
|                     |                                                 
|_Alix of NESLE ______|
  (1270 - 1330)       |
                      |                       __________________________
                      |                      |                          
                      |______________________|
                                             |
                                             |__________________________