_Adalbert II BONIFACE __+
                                                  | (0875 - 0915)          
                             _Guy BONIFACE _______|
                            | (.... - 0928)       |
                            |                     |_Bertha of CAROLINGIAN _+
                            |                       (0863 - 0924)          
 _Adalberto III OBERTENGHI _|
| (.... - 0951)             |
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|                           |_Marozia of ROME ____|
|                             (0890 - 0924)       |
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|
|--Oberto I OBERTENGHI 
|  (.... - 0975)
|                                                  ________________________
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