Of the Holy Men who flourished about this time in Egypt, namely, Antony, the Two Macariuses, Heraclius, Cronius, Paphnutius, Putubastus, Arsisius, Serapion, Piturion, Pachomius, Apollonius, Anuph, Hilarion, and a Register of many other Saints
I have now related what I have been able to ascertain concerning the individuals who practiced philosophy in piety and ecclesiastical rites. There were many others who were noted in the churches about the same period on account of their great eloquence, and among these the most distinguished were, Eusebius, who administered the priestly office at Emesa; Titus, bishop of Bostra; Serapion, bishop of Thmuis; Basil, bishop of Ancyra; Eudoxius, bishop of Germanicia; Acacius, bishop of Cæsarea; and Cyril, who controlled the see of Jerusalem. A proof of their education is in the books they have written and left behind, and the many things worthy of record.
Source: Ecclesiastical History (New Advent)