Webster’s Revised Unabridged Dictionary · 1913
Demarch
De·march′ (dē·märch′), n. [F. démarche. See March, n.] March; walk; gait. [Obs.]
De·march (dē′märk), n. [Gr. δήμαρχος; δῆμος people + ἄρχειν to rule.] A chief or ruler of a deme or district in Greece.