Probably from Iguvium in Umbria. Praetorian legate under Poppaeus Sabinus before AD 16 in Moesia, where Ovidius sent him the letter Pont. 1,10. Cos. ord. in 17. Sent to Moesia by Tiberius in 19 as governor to solve problems with the Thraci. He was a close friend of Tiberius, who appointed him consular governor of Syria in AD 32. Negotiations with Herodes Agrippa, with whom P. broke his friendship. P. died in the province. Brother of P.