(Ἑρμόλαος), a Greek grammarian of Constantinople, of whom nothing more is known with certainty than that he wrote an epitome of the Ἐθνικά of Stephanus of Byzantium, which he dedicated to the emperor Justinian. (Suidas, s. v. Ἑρμόλαος.) But whether he lived in the reign of the first or in that of the second emperor of that name cannot be clearly ascertained. There seems no reason for doubting that the epitome of Hermolaus is the same which is still extant, and which bears the title "Ἐκ τῶν ἐθνικῶν Στεφαάνου κατὰ ἐπιτομήν," but without the name of the author. In its present form even this epitome seems to have suffered considerable abridgment and mutilation. Some passages in the work have been supposed to furnish a few particulars especting the life of Hermolaus; but as the more probable opinion seems to be that they are mere verbal extracts from the work of Stephanus, an account of them is given under STEPHANUS. (Fabric. Bibl. Graec. vol. iv. p. 622, &c.; Westermann, Praefat. ad Steph. Byzant. pp.v.xxiv. &c.