Diogenes

Diogenes is named only as the recipient of a handful of late-antique letters, and the record is almost certainly a conflation of more than one person, since the bearers of this very common Greek name appear across three unrelated collections from different times and places: the correspondence of the emperor Julian (mid-4th century, Antioch and the Greek East), of Synesius of Cyrene (Cyrenaica, c. 400), and of Isidore of Pelusium (Egypt, early-to-mid 5th century). No single individual can be securely identified behind these letters, and nothing specific is reliably known of his office, dates, or biography. He is best understood as one or more obscure correspondents, probably an educated layman, official, or fellow churchman addressed in passing, rather than a documented historical figure in his own right.