Eulalius, of Persian Armenia

Eulalius is a name borne by several minor figures in late antique Greek and Latin correspondence; the record here, tagged 'of Persian Armenia' and linked to three collections from different generations (Gregory of Nazianzus in the 4th century, Theodoret of Cyrrhus in the 5th, and Ennodius of Pavia around 500), almost certainly conflates distinct individuals who shared this common name rather than a single person. No biography can be securely reconstructed: the figure is otherwise little attested and known only as a recipient of letters. The geographic label points to the highland region of historical Armenia around Theodosiopolis (modern Erzurum), on the Roman-Persian frontier, but this placement is uncertain and should be treated as an inference from the record rather than an established fact. Honest caution is warranted here: the specific identity, dates, and offices cannot be confirmed from the surviving evidence.