Theon

Otherwise little attested; known chiefly as a recipient of eight short letters from Isidore of Pelusium, the fifth-century Egyptian ascetic and biblical exegete whose surviving correspondence runs to some two thousand brief epistles. Like many of Isidore's named addressees, Theon is not securely identifiable from independent sources, and his exact office, dates, and biography are unknown. On the basis of Isidore's circle he was most plausibly a cleric, monk, or correspondent active in the region of Pelusium in the Nile Delta during the first half of the fifth century, but this is an inference from the letters rather than established fact.