Irenarch

• (n.) An officer in the Greek empire having functions corresponding to those of a justice of the peace.
Found on http://thinkexist.com/dictionary/meaning/irenarch/

Irenarch

I're·narch noun [ Latin irenarcha , irenarches , Greek ...; ... 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 .]
Found on http://www.encyclo.co.uk/webster/I/95

irenarch

ancient Roman and Byzantine keeper of the peace
Found on http://phrontistery.info/i.html
No exact match found