 He was the son of Alberic II (son of Alberic I of Spoleto and Marozia), and Alda of Vienne (daughter of Hugh, King of Italy and his second wife, Alda (or Hilda)).His half-brother was Pope John XII.He held the cities of Galeria, Arce, and Preneste and the title count palatine, the palace referred to being that of the Lateran.