_William WELF ________+
                                                 | (1184 - 1213)        
                            _Otto I WELF ________|
                           | (1204 - 1252) m 1228|
                           |                     |_Helena of ESTRIDSEN _+
                           |                       (1180 - 1233)        
 _John WELF _______________|
| (1242 - 1277)            |
|                          |                      _Albert II ASCANIA ___+
|                          |                     | (1177 - 1219) m 1205 
|                          |_Matilda of ASCANIA _|
|                            (1210 - 1261) m 1228|
|                                                |_Matilda of WETTIN ___+
|                                                  (1185 - 1225) m 1205 
|
|--Otto II WELF 
|  (1266 - 1330)
|                                                 ______________________
|                                                |                      
|                           _____________________|
|                          |                     |
|                          |                     |______________________
|                          |                                            
|_Liutgard of SCHAUENBURG _|
  (.... - 1288)            |
                           |                      ______________________
                           |                     |                      
                           |_____________________|
                                                 |
                                                 |______________________