_Adalbert I of IVREA ___+
                                                   | (.... - 0928)          
                       _Berengar II IVREA _________|
                      | (0900 - 0966)              |
                      |                            |_Gisela of UNRUOCHINGI _+
                      |                              (0876 - 0912)          
 _Adalbert II IVREA __|
| (0932 - 0971)       |
|                     |                             _Boso BOSONID __________+
|                     |                            | (.... - 0940)          
|                     |_Willa of BOSONID __________|
|                       (0911 - 0970)              |
|                                                  |_Willa of WELF _________+
|                                                    (0900 - 0936)          
|
|--Otto-William IVREA 
|  (0955 - 1026)
|                                                   ________________________
|                                                  |                        
|                      _Lambert of UNKNOWN ________|
|                     |                            |
|                     |                            |________________________
|                     |                                                     
|_Gerberga of MÂCON _|
                      |
                      |                             _Gilbert BOSONID _______
                      |                            | (.... - 0956)          
                      |_Adelaide-Werra of BOSONID _|
                                                   |
                                                   |_Ermengarde of BIVINID _+
                                                     (0905 - 0945)