_Floris IV HOLLAND _______+
                                                | (1210 - 1234) m 1214     
                          _William II HOLLAND __|
                         | (1226 - 1255)        |
                         |                      |_Matilda of REGINAR ______+
                         |                        (1200 - 1267) m 1214     
 _Floris V HOLLAND ______|
| (1254 - 1296) m 1270   |
|                        |                       _Otto I WELF _____________+
|                        |                      | (1204 - 1252) m 1228     
|                        |_Elisabeth of WELF ___|
|                          (1230 - 1266)        |
|                                               |_Matilda of ASCANIA ______+
|                                                 (1210 - 1261) m 1228     
|
|--John I HOLLAND 
|  (1284 - 1299)
|                                                _William II DAMPIERRE ____+
|                                               | (1196 - 1231) m 1223     
|                         _Guy DAMPIERRE _______|
|                        | (1226 - 1304)        |
|                        |                      |_Margaret II of FLANDERS _+
|                        |                        (1202 - 1279) m 1223     
|_Beatrice of DAMPIERRE _|
  (1260 - 1291) m 1270   |
                         |                       _Robert VII BÉTHUNE _____+
                         |                      | (1201 - 1248)            
                         |_Matilda of BÉTHUNE _|
                           (.... - 1263)        |
                                                |_Elisabeth of MORIALMEZ __