ἐφήβαρχος
ἐφήβ-αρχος, ὁ,(ἔφηβος, ἄρχω)
A). overseer of the youth, a magistrate in several Greek cities, OGI 339.42 (Sestos), IG 12(2).134 (Mytilene, in form ἐφάβ-), 12(3).524 (Thera), SIG 798.23 (Cyzicus), etc., cf. Epict. 3.1.34 , 7.19 :