Ἑλληνάρχης
From LSJ
τὸ γὰρ πράττειν τοῦ λέγειν καὶ χειροτονεῖν ὕστερον ὂν τῇ τάξει, πρότερον τῇ δυνάμει καὶ κρεῖττόν ἐστιν (Demosthenes 3.15) → for action, even though posterior in the order of events to speaking and voting, is prior in importance and superior
English (LSJ)
ου, ὁ,
A chief of the Greek community, title at Tanais, IPE2.423, al.
Greek (Liddell-Scott)
Ἑλληνάρχης: ὁ, ἄρχων τῶν Ἑλλήνων, ἄρχων ἐν Σαρματίᾳ, Συλλ. Ἐπιγρ. (προσθῆκαι) 2132d, e.