Bithron
The name Bithron means “divisions”.
Smith's Bible Dictionary 1863
more accurately the Bithron (a craggy gorge or ravine), a place, doubtless a district, in the Jordan valley on the east side of the river. (2 Samuel 2:29)
International Standard Bible Encyclopedia 1915
bith'-ron (ha-bithron; holen ten parateinousan, literally "the entire (land) extending"; 2Sa 2:29, "the Bithron," i.e. the gorge or groove): Does not seem to be a proper name; rather it indicates the gorge by which Abner approached Mahanaim. Buhl (GAP, 121) favors identification with Wady `Ajlun, along which in later times a Ro road connected `Ajlun and Mahanaim. Others (Guthe, Kurz. bib. Worterbuch, under the word) incline to Wady esh Sha`ib.