| | | | | |
|
| | | | | | | Theophylact I, Count of Tusculum
864–924 | | | | Theodora |
| | | |
| | | | | | | | | | | | | |
|
Hugh of Italy
887-924-948
(also married Marozia) | | Alberic I of Spoleto
d. 925 | | | | Marozia
890–937 | | | | Pope Sergius III
904–911 |
| | | | | | | |
| | | | | | | | | | | | | | | | | | | | |
| | | | | |
| Alda of Vienne | | Alberic II of Spoleto
905–954 | | David or Deodatus | | | Pope John XI
931–935 |
| |
| | | | | | | | | | | | | | |
| | | | | |
| Gregory I, Count of Tusculum | | Pope John XII
955–964 | | Pope Benedict VII
974-983 |
|
| | | | | | | | | | | | |
| | | | | | | | | |
Pope Benedict VIII
Pope 1012–1024 | | Alberic III, Count of Tusculum
d. 1044 | | Pope John XIX
Pope 1024–1032 |
|
| | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | |
| Peter, Duke of the Romans | | Gaius | | Octavianus | | Pope Benedict IX
1012–1055 |
|