_Albert ASCANIA _______+
                                             | (1100 - 1170)         
                       _Bernard III ASCANIA _|
                      | (1134 - 1211) m 1173 |
                      |                      |_Sophie of FORMBACH ___
                      |                        (1105 - 1160)         
 _Albert I ASCANIA ___|
| (1175 - 1260) m 1247|
|                     |                       _Mieszko III PIAST ____+
|                     |                      | (1126 - 1201)         
|                     |_Judith of PIAST _____|
|                       (1154 - 1201) m 1173 |
|                                            |_Elizabeth of ÁRPÁD _+
|                                                                    
|
|--John I ASCANIA 
|  (1249 - 1285)
|                                             _William WELF _________+
|                                            | (1184 - 1213)         
|                      _Otto I WELF _________|
|                     | (1204 - 1252) m 1228 |
|                     |                      |_Helena of ESTRIDSEN __+
|                     |                        (1180 - 1233)         
|_Helen of WELF ______|
  (1231 - 1273) m 1247|
                      |                       _Albert II ASCANIA ____+
                      |                      | (1177 - 1219) m 1205  
                      |_Matilda of ASCANIA __|
                        (1210 - 1261) m 1228 |
                                             |_Matilda of WETTIN ____+
                                               (1185 - 1225) m 1205