Peter, Duke of the Romans

Peter was a mediaeval Roman noble. He was the son of Alberic III, Count of Tusculum.

Family tree

 
 
 
 
 
 
 
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, Count of Tusculum
 
Gaius, Count of Tusculum
 
Octavianus, Count of Tusculum
 
Pope Benedict IX
1012–1055

Sources