ἐφήβαρχος
From LSJ
κρεῖττον εἶναι φιλοσόφως ἀποθανεῖν ἢ ἀφιλοσόφως ζῆν → that it is better to die in manner befitting a philosopher than to live unphilosophically
English (LSJ)
ὁ, (ἔφηβος, ἄρχω)
A overseer of the youth, a magistrate in several Greek cities, OGI339.42 (Sestos), IG12(2).134 (Mytilene, in form ἐφάβ-), 12(3).524 (Thera), SIG798.23 (Cyzicus), etc., cf. Arr.Epict.3.1.34, 7.19:
German (Pape)
[Seite 1116] ὁ, Aufseher über die Jünglinge (s. ἔφηβος), Arr. Epict. 3, 1, 34.