Stephanus of Byzantium
Stephenus or Stephan of Byzantium (Latin: Stephanus Byzantinus; Greek: Στέφανος Βυζάντιος, Stéphanos Byzántios; fl. 6th century AD), was the author of an important geographical dictionary called Ethnica (Ἐθνικά). The details of his life are unknown.
Stephanus Of Byzantium Media
The Byzantine Empire during Stephanus' lifetime, with Justinian's conquests in green