PHYLARCH fī’ lärk (φυλάρχην, from φυλάρχης, φύλαρχος). The phylarch is the chief of a φυλή, G5876, a division in the Gr. army. KJV has tr. the name as a proper noun, Philarches (
In this passage, the Jews under the leadership of Judas Maccabeus slew several thousand of those under the command of Nicanor. One phylarch who was with Timotheus was slain also.
International Standard Bible Encyclopedia (1915)
Given in theof 2 Macc 8:32 as a proper name "Philarches," but in the (British and American) "the phylarch of Timotheus’s forces"; "probably the captain of an irregular auxiliary force" (Revised Version margin), rather than a cavalry officer.