Passage 10.35.5
ἐπανελθόντα δὲ ἐς τὴν ὁδὸν τὴν ἐς Ὀποῦντα εὐθεῖαν Ὑάμπολις τὸ ἀπὸ τούτου σε ἐκδέξεται. τῶν δὲ ἐνταῦθα ἀνθρώπων καὶ αὐτὸ κατηγορεῖ τὸ ὄνομα οἵτινες ἦσαν ἐξ ἀρχῆς καὶ ὁπόθεν ἐξαναστάντες ἀφίκοντο ἐς ταύτην τὴν χώραν· Ὕαντες γὰρ οἱ ἐκ Θηβῶν Κάδμον καὶ τὸν σὺν ἐκείνῳ φυγόντες στρατὸν ἀφίκοντο ἐνταῦθα. τὰ μὲν δὴ ἀρχαιότερα ὑπὸ τῶν προσχώρων ἐκαλοῦντο Ὑάντων πόλις, χρόνῳ μέντοι ὕστερον Ὑάμπολιν ἐξενίκησεν ὀνομασθῆναι.
Returning again to the direct road leading to Opous, you next reach Hyampolis. The name itself indicates clearly who its first inhabitants were and from where they migrated to this land; for Hyantes from Thebes, those who fled with Kadmos and his army, came hither. In more ancient times the neighboring peoples called it the city of the Hyantes, but later, with the passing of time, the name Hyampolis prevailed.