Αἰνιάρχαι
From LSJ
οἱ τοῖς πέλας ἐπιβουλεύοντες, λανθάνουσι πολλὰκις ὑφ' ἑτέρων τοῦτ' αὐτὸ πάσχοντες → when people plot against their neighbours, they fall victim to the same sort of plot themselves
-ῶν, οἱ
eniarcas magistrados de la liga de los enianes IG 9(2).6a.1, 7b.1 (ambas Hipata II a.C.).