Pandulf V was the count of Teano

Teano

Teano is a town and comune of Campania, Italy, in the province of Caserta, 30 km north-west of that town on the main line to Rome from Naples. It stands at the south-east foot of an extinct volcano, Rocca Monfina.- Ancient times and Middle Ages:...

 and prince of Capua (1022 – 1026). 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

Pilgrim, Archbishop of Cologne

Pilgrim was the archbishop of Cologne and archchancellor of Italy in the Holy Roman Empire, a dignity he obtained for all his successors....

, who besieged Capua and deposed the current prince, Pandulf IV

Pandulf IV of Capua

Pandulf IV was the Prince of Capua on three separate occasions.From February 1016 to 1022 he ruled in association with his cousin Pandulf II. In 1018, the Byzantine catapan Boiannes destroyed the Lombard army of Melus of Bari and his Norman allies at Cannae...

 was imprisoned in Germany. The Emperor Henry II officially granted the principality to Pandulf V in 1023 and associated his son John with him as co-prince.

In 1024, at the behest of Guaimar III of Salerno

Guaimar III of Salerno

Guaimar III was duke of Salerno from around 994 to his death. His date of death is sometimes given as 1030 or 1031, but the most reliable sources consistently indicate 1027. Under his reign, Salerno entered an era of great splendour...

, 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

Byzantine Empire

The Byzantine Empire was the Eastern Roman Empire during the periods of Late Antiquity and the Middle Ages, centred on the capital of Constantinople. Known simply as the Roman Empire or Romania to its inhabitants and neighbours, the Empire was the direct continuation of the Ancient Roman State...

 catapan

Catapanate of Italy

The Catepanate of Italy was a province of the Byzantine Empire, comprising mainland Italy south of a line drawn from Monte Gargano to the Gulf of Salerno. Amalfi and Naples, although north of that line, maintained allegiance to Constantinople through the catepan...

 Basil Boiannes, who had been busy on a Sicilian expedition, joined them with a giant force. In 1026, after an 18-month siege, Boiannes negotiated Pandulf V's surrender and granted him and his son John safe conduct to Naples

Naples

Naples is a city in Southern Italy, situated on the country's west coast by the Gulf of Naples. Lying between two notable volcanic regions, Mount Vesuvius and the Phlegraean Fields, it is the capital of the region of Campania and of the province of Naples...

.

In 1027, Pandulf IV, now reinstated, besieged Sergius IV of Naples

Sergius IV of Naples

Sergius IV was Duke of Naples from 1002 to 1036. He was one of the prime catalysts in the growth of Norman power in the Mezzogiorno in the first half of the eleventh century...

, who had offered haven to Pandulf of Teano. The city fell and Sergius went into hiding. Pandulf and his son fled to either Rome

Rome

Rome is the capital of Italy and the country's largest and most populated city and comune, with over 2.7 million residents in . The city is located in the central-western portion of the Italian Peninsula, on the Tiber River within the Lazio region of Italy.Rome's history spans two and a half...

 or "Romania

Byzantine Empire

The Byzantine Empire was the Eastern Roman Empire during the periods of Late Antiquity and the Middle Ages, centred on the capital of Constantinople. Known simply as the Roman Empire or Romania to its inhabitants and neighbours, the Empire was the direct continuation of the Ancient Roman State...

", where he died some years later. John was dead by 1052, when his younger brother Pandulf appears as the "firstborn" among his brothers.