tetrarchēs

A compound of τετρα- (from τέσσαρες, "four") plus -άρχης (from ἀρχή/ἄρχω), literally "ruler of a fourth part." LSJ documents the earliest secure usage for the four historical divisions of Thessaly (Dem. 9.26) and for the Galatian tetrarchies of Strabo 12.5.1, and notes that in the Roman period it designates rulers under Roman protection of lower grade than kings; BDAG (3rd ed., 1000) glosses it "tetrarch, orig. the ruler of a fourth part of a region, but under the Romans used of any petty prince or dependent ruler in the East, lower in rank than a king," and Louw-Nida §37.86 gives the same double definition. The arithmetical force is already dissolved in Pliny, who describes eastern tetrarchies as "each of them equivalent to a kingdom" (NH 5.16 §74) and counts seventeen of them in Syria (5.19 §81-82). TDNT has no dedicated article, the compound being merely listed under the ἄρχω word-group, since the term carries no distinctive theological freight; EDNT supplies a short historically oriented entry specifying the Herodian hierarchy (ethnarch Archelaus above tetrarchs Antipas and Philip). Moulton-Milligan note that the documentation is overwhelmingly epigraphic rather than papyrological (OGIS 416 from Cos, 543 from Ancyra, 606 from Syria, SIG3 274 from Delphi, IGRR 4.1683 from Pergamon), Egypt having been governed by a prefect and never having had tetrarchs. Two orthographies circulate in the NT witnesses, the fuller τετραάρχης printed by NA28/UBS5 and the contracted τετράρχης of the later Byzantine tradition; the variance is phonological and semantically inert. Josephus supplies the framework the Gospels presuppose (Ant. 17.188-189, 317-320; War 1.664, 2.93-100), using τετράρχης and τετραρχία as technical Roman terms, and Antipas's Tiberias bronzes carrying the legend ΗΡΩΔΗC ΤΕΤΡΑΡΧΗC show the title was his own official self-designation (Meshorer; Jensen). The much-discussed titular question is redactional rather than lexical: Mark 6:14 calls Antipas ὁ βασιλεύς, which commentators from Swete and France to Yarbro Collins and Marcus read as popular or narrative-rhetorical rather than technical; Matthew corrects to τετραάρχης at the redactional frame of 14:1 but reverts to βασιλεύς at 14:9 (Davies-Allison, ICC 2.468-469, on incomplete scrubbing of Markan diction; Luz allows the breadth of an underlying Aramaic malkā); Luke alone is systematically consistent, overwriting Mark's "king" at 9:7 and never applying βασιλεύς to Antipas, a datum Marshall, Nolland and Fitzmyer treat as a signature editorial move and Hoehner explains as the preservation of both the official and the popular register. Luke's cognate verb at 3:1 constructs a Hellenistic synchronism whose third tetrarch, Lysanias of Abilene, was long alleged to be an error until the Abila inscription (CIG 4521 = OGIS 606, re-edited by Savignac) attested a later Lysanias styled tetrarch during the joint Augusti of 14-29 CE; Schurer-Vermes-Millar (1.561-573) is the standard treatment and its verdict in Luke's favour is the consensus.