_Albert Azzo II OBERTENGHI ________+
                                              | (0997 - 1097) m 1035              
                         _Welf IV WELF _______|
                        | (1035 - 1101)       |
                        |                     |_Kunigunde of WELF ________________+
                        |                       (1020 - 1054) m 1035              
 _Henry IX WELF ________|
| (1075 - 1126)         |
|                       |                      _Baldwin IV FLANDERS ______________+
|                       |                     | (0980 - 1035)                     
|                       |_Judith of FLANDERS _|
|                         (1030 - 1093)       |
|                                             |_Eleanor of NORMANDY ______________+
|                                               (1010 - 1071)                     
|
|--Sophia of WELF 
|  (1105 - 1145)
|                                              _Ordulf BILLUNG ___________________+
|                                             | (1022 - 1072)                     
|                        _Magnus BILLUNG _____|
|                       | (1045 - 1106)       |
|                       |                     |_Wulfhild Olafsdatter of FAIRHAIR _+
|                       |                       (1020 - 1071)                     
|_Wulfhilde of BILLUNG _|
  (1072 - 1126)         |
                        |                      _Béla I ÁRPÁD __________________+
                        |                     | (1015 - 1063) m 1033              
                        |_Sophia of ÁRPÁD __|
                          (1050 - 1095)       |
                                              |_Richeza of PIAST _________________+
                                                (1013 - 1075) m 1033