τετραάρχης (Rec. τετράρχης, see supr.), -ου, ὁ
(τετρα- in corp. = τέτορα, Doric for τέσσαρα, + ἄρχω),
a tetrarch, i.e.
__(a) prop., the governor of a fourth part of a region (Strab.);
__(b) any petty ruler (Plut.); in NT, of Herod Antipas: Mat.14:1, Luk.3:19 9:7, Act.13:1.†
(AS)