_William WELF ________+
                                               | (1184 - 1213)        
                          _Otto I WELF ________|
                         | (1204 - 1252) m 1228|
                         |                     |_Helena of ESTRIDSEN _+
                         |                       (1180 - 1233)        
 _Albert I WELF _________|
| (1236 - 1279)          |
|                        |                      _Albert II ASCANIA ___+
|                        |                     | (1177 - 1219) m 1205 
|                        |_Matilda of ASCANIA _|
|                          (1210 - 1261) m 1228|
|                                              |_Matilda of WETTIN ___+
|                                                (1185 - 1225) m 1205 
|
|--Otto WELF 
|  (.... - 1346)
|                                               ______________________
|                                              |                      
|                         _____________________|
|                        |                     |
|                        |                     |______________________
|                        |                                            
|_Adelheid of ALERAMICI _|
  (1242 - 1285)          |
                         |                      ______________________
                         |                     |                      
                         |_____________________|
                                               |
                                               |______________________