Phōtīnus | Phōtīnĭāni (noun M) : Φωτεινός * A male proper name. So esp., the bishop of Sirmium, founder of a Christian sect, the adherents of which are called , Isid. Orig. 8, 5; Cod. Just. 1, 5, 5.
Charlton T. Lewis, Charles Short, A Latin Dictionary
PMBZ
Personal name Confirmed occurences in the Byzantine time: