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The Collaborative International Dictionary
eirenarch

Irenarch \I"re*narch\, n. [L. irenarcha, irenarches, Gr. ?; ? peace + ? to rule.] (Gr. Antiq.) An officer in the Greek empire having functions corresponding to those of a justice of the peace. [Written also eirenarch.]

Wiktionary
eirenarch

n. (alternative form of irenarch English)