Tetrarch @ strictly the ruler over the fourth part of a province; but the word denotes a ruler of a province generally Matthew:14:1; Luke:3:1Luke:3:19Luke:9:7; Acts:13:1). Herod and Phasael, the sons of Antipater, were the first tetrarchs in Palestine. Herod the tetrarch had the title of king Matthew:14:9).