ἱεράρχης · hierarchēs — LSJ
president of sacred rites, high-priest, to be high-priest
president of sacred rites, high-priest, IG 7.303 (Oropus), 9(1).32 (Stiris): Boeot. ἱᾰράρχᾱς Schwyzer 515.4, al.:—hence Boeot. ἱᾰραρχίω, to be high-priest, ib. 544.4.