Ἀληθιών
Could not find Ἀληθίωνος in Logeion dictionaries.
Ἀληθίωνος Proper-name noun: masculine genitive singular of Ἀληθίων
Ἀληθιών, ῶνος, sc. μήν, month at Iasos, Leipz.Stud. 7.397.
Aletión n. de mes en Yaso IIasos 23.3 (II a.C.).