Passage 8.27.2
γνώμῃ μὲν τοιαύτῃ συνῳκίζοντο οἱ Ἀρκάδες, τῆς πόλεως δὲ οἰκιστὴς Ἐπαμινώνδας ὁ Θηβαῖος σὺν τῷ δικαίῳ καλοῖτο ἄν· τούς τε γὰρ Ἀρκάδας οὗτος ἦν ὁ ἐπεγείρας ἐς τὸν συνοικισμὸν Θηβαίων τε χιλίους λογάδας καὶ Παμμένην ἀπέστειλεν ἡγεμόνα ἀμύνειν τοῖς Ἀρκάσιν, εἰ κωλύειν πειρῶνται οἱ Λακεδαιμόνιοι τὸν οἰκισμόν. ᾑρέθησαν δὲ καὶ ὑπὸ τῶν Ἀρκάδων οἰκισταὶ Λυκομήδης καὶ Ὁπολέας καὶ Τίμων τε καὶ Πρόξενος, οὗτοι μὲν ἐκ Τεγέας, Λυκομήδης δὲ καὶ Ὁπολέας Μαντινεῖς, Κλειτορίων δὲ Κλεόλαος καὶ Ἀκρίφιος, Εὐκαμπίδας δὲ καὶ Ἱερώνυμος ἐκ Μαινάλου, Παρρασίων δὲ Ποσσικράτης τε καὶ Θεόξενος.
It was with this intent that the Arcadians began their foundation together, but Epaminondas the Theban could justly be named as founder of their city. For he was the one who stirred the Arcadians to this settlement and sent one thousand picked Thebans under Pammenes as commander to aid the Arcadians, in case the Lacedaemonians attempted to hinder the founding. Moreover, the Arcadians themselves also elected founders: Lycomedes and Opoleas from Mantineia; Timon and Proxenus from Tegea; Cleolaus and Acriphius from Cleitor; Eucampidas and Hieronymus from Maenalus; and Possicrates and Theoxenus from Parrhasia.