P. C., as the name appears on medals; REGALLIANUS, as he is called by Victor (de Caes.
); or REGILLIANUS, according to Victor, in his Epitome, and Trebellius Pollio, who ranks him among the thirty tyrants [see AUREOLUS], was a Dacian by descent, allied, it is said, to Decebalus, distinguished himself by his military achievements on the Illyrian frontier, was commended in the warmest terms by Claudius, at that time in a private station, and promoted to a high command by Valerian. The Moesians, terrified by the cruelties inflicted by Gallienus on those who had taken part in the rebellion of Ingenuus, suddenly proclaimed Regalianus emperor, and quickly, with the consent of the soldiers, in a new fit of alarm, put him to death.
These events took place A. D. 263. (Aurel. Vict. de Caes.
xxxii. ; Trebell. Poll. Trig. Tyrann.