Only Stephanos Byzantios mentions the city Pherai (Φεραί Παρθίας): «εἰσὶ καὶ ἄλλαι Ἰαπυγίας καὶ Αἰτωλίας καὶ Παρθυαίων» (there are others in Iapygia, Aitolia and among the Parthians). It is unknown whether it was a Hellenistic military settlement.
Thessalian cavalry men were in service of Alexander's army and his successors. Perhaps these Thessalians came from the homonymous city in Thessalia (Pherae) and established a colony in Parthia. There was also a Thessalian colony in Syria called Larissa.The Hellenistic settlements in Syria, the Red Sea Basin, and North Africa By Getzel M. Cohen, Page 118
Sources Notes
Bibliography Johann Gustav Droysen Geschichte des Hellenismus. Stephanus of Byzantium Ethnika.