Career
That he was related to the ruling dynasty of Capua seems likely, but is uncertain. He was installed at Capua by Pilgrim, Archbishop of Cologne, who besieged Capua and deposed the current prince, Pandulf IV was imprisoned in Germany. In 1024, at the behest of Guaimar III of Salerno, Emperor Conrad II released Pandulf IV. Guaimar and Pandulf promptly besieged Capua with the help of the Norman mercenary Rainulf Drengott.
In 1025, the Byzantine catapan Basil Boiannes, who had been busy on a Sicilian expedition, joined them with a giant force.
In 1027, Pandulf IV, now reinstated, besieged Sergius IV of Naples, who had offered haven to Pandulf of Teano. The city fell and Sergius went into hiding.