Porphyrius
Martyrological notice
The historical Roman Martyrology commemorates Porphyrius on 4 May. The Latin notice identifies the record as martyr and priest. The source places the commemoration at Camerini.
Historical martyrology witness · Martyrologium Romanum (Latin historical edition)
Camerini sancti Porphyrii, Presbyteri et Martyris, qui, sub Decio Imperatore et Antiocho Praeside, cum plurimos (in quibus fuit Venantius) ad Christi fidem convertisset, capite amputatus est.