Hagarenes in Smiths Bible Dictionary

(named after Hagar), a people dwelling to the east of Israel, with whom the tribes of Reuben made war in the time of Saul. 1Ch 5:10,18-20 The same people, as confederate against Israel, are mentioned in Ps 83:6 It is generally believed that they were named after Hagar, and that the important town and district of Hejer, on the borders of the Persian Gulf, represent them.