Who
A rich and learned Egyptian who became bishop of Thmuis in the Nile delta and was beheaded at Alexandria under Diocletian. Eusebius preserves his letter from prison describing the martyrs of Alexandria. With three other imprisoned bishops he wrote to Meletius of Lycopolis, protesting his ordinations in their dioceses, the start of the Meletian schism.
Quoted in
Fragments of the Epistle of Phileas to the People of Thmuis · Part II · …