ecclesiarches Save DMLBS Du Cange ecclesiarches [ἐκκλησιάρχης] , church ruler, bishop. 980 (11c) ego Osuald Christi dapsilitate aecclesiarches CD 625; 1017 ego Wulfstan in humilitate ~es CD 1313. ECCLESIARCHES, Ecclesiæ Præfectus, in Amalthea, et alibi.