ἐφήβαρχος

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. Arr. Epict. 3.1.34, 7.19:
Liddell, Scott & Jones
A Greek-English Lexicon, 1940
An open-access project