Cushan in the Bible.

About Cushan.

Probably a poetic or prolonged name of the land of Cush, the Arabian Cush (Hab. 3:7). Some have, however, supposed this to be the same as Chushan-rishathaim (Judg. 3:8, 10), i.e., taking the latter part of the name as a title or local appellation, Chushan “of the two iniquities” (= oppressing Israel, and provoking them to idolatry), a Mesopotamian king, identified by Rawlinson with Asshur-ris-ilim (the father of Tiglathpileser I.); but incorrectly, for the empire of Assyria was not yet founded. He held Israel in bondage for eight years.

From Easton’s Bible Dictionary (1897).