_Anscar I IVREA _________+
                                               | (0860 - 0902)           
                       _Adalbert I of IVREA ___|
                      | (.... - 0928)          |
                      |                        |_________________________
                      |                                                  
 _Berengar II IVREA __|
| (0900 - 0966)       |
|                     |                         _Berengar I UNRUOCHINGI _+
|                     |                        | (0845 - 0924)           
|                     |_Gisela of UNRUOCHINGI _|
|                       (0876 - 0912)          |
|                                              |_Bertila of SUPPONID ____+
|                                                (0860 - 0915)           
|
|--Guy IVREA 
|  
|                                               _Theobald BOSONID _______+
|                                              | (0854 - 0895)           
|                      _Boso BOSONID __________|
|                     | (.... - 0940)          |
|                     |                        |_Bertha of CAROLINGIAN __+
|                     |                          (0863 - 0924)           
|_Willa of BOSONID ___|
  (0911 - 0970)       |
                      |                         _Rudolf I WELF __________+
                      |                        | (0859 - 0912)           
                      |_Willa of WELF _________|
                        (0900 - 0936)          |
                                               |_Guilla of BIVINID ______+
                                                 (0873 - 0924)