Passage 9.34.6
τοῦ δὲ ὄρους τοῦ Λαφυστίου πέραν ἐστὶν Ὀρχομενός, εἴ τις Ἕλλησιν ἄλλη πόλις ἐπιφανὴς καὶ αὕτη ἐς δόξαν. εὐδαιμονίας δέ ποτε ἐπὶ μέγιστον προαχθεῖσαν ἔμελλεν ἄρα ὑποδέξεσθαι τέλος καὶ ταύτην οὐ πολύ τι ἀποδέον ἢ Μυκήνας τε καὶ Δῆλον. περὶ δὲ τῶν ἀρχαίων τοιαῦτʼ ἦν ὁπόσα καὶ μνημονεύουσιν. Ἀνδρέα πρῶτον ἐνταῦθα Πηνειοῦ παῖδα τοῦ ποταμοῦ λέγουσιν ἐποικῆσαι καὶ ἀπὸ τούτου τὴν γῆν Ἀνδρηίδα ὀνομασθῆναι·
Beyond Mount Laphystius lies Orchomenus, a city as distinguished as any other among the Greeks for its renown. It once rose to the highest degree of prosperity, and yet was destined, like Mycenae and Delos, soon thereafter to suffer its final downfall. Regarding ancient events, the following traditions are preserved: they say that Andreus, son of the river Peneius, first settled the area, after whom the land came to be called Andreis.