Tetrarch (Greek, Τετράρχης):

By: Executive Committee of the Editorial Board. , Samuel Krauss

A governor of a quarter of a province; the title of several feudal lords of Palestine and neighboring countries who were subject to Roman suzerainty. This title, which evidently implies a rank somewhat lower than that of Ethnarch , was held by the following Jewish princes: Herod the Great before he became king, and his brother Phasael , both of whom received the office from Antony (Josephus, "Ant." xiv. 13, § 1; idem , "B. J." i. 12, § 5); Pheroras , whom Augustus, at the request of Herod, appointed tetrarch of Perea (20 B.C. ), a post which yielded him an income of 100 talents ("Ant." xv. 10, § 3; "B. J." i. 24, § 5); Herod Antipas , who was tetrarch of Galilee (Luke iii. 1); Philip , who governed Iturea and Trachonitis ( ib. ); and Lysanias, who ruled Abilene ( ib. ).

The district governed by a tetrarch was called a. tetrarchy ("Ant." xx. 7, § 1); and this term was first used by Euripides, who applied it to Thessaly, attributing to it its original connotation of a quarter province, since Thessaly was divided into four districts. "Tetrarch" was employed in a similar sense with reference to Galatia; but in other countries, as well as among the Jews, it lost its primary meaning, and came to imply a ruler whose power was less than that of a king. Such tetrarchs were especially numerous in Syria (Pliny, "Historia Naturalis," v. 74), and one Sohemus of Lebanon is mentioned by Josephus ("Vita," § 11). Kings and tetrarchs furnished auxiliary troops to the army of Varus ("Ant." xvii. 10, § 9). The Herodian tetrarchs, either from error or from mere flattery, were addressed also as kings (comp. Matt. ii. 22, xiv. 9); and it was with but little justification that Agrippa , II. styled himself "king," since, as a matter of fact, he was but a tetrarch.