Easton's Bible Dictionary (1897)
The Authorized Version, following the Vulgate, has this rendering in Josh. 19:34. ” The sixty cities (Havoth-jair, Num. 32:41) on the east of Jordan were reckoned as belonging to Judah, because Jair, their founder, was a Manassite only on his mother’s side, but on his father’s side of the tribe of Judah (1 Chr. 2:5, 21-23).
Hastings' Dictionary of the Bible (1898) & Schaff's Bible Dictionary
JUDAH UPON JORDAN, a town in Naphtali. Josh 19:34. Why it was so called is not known. Some regard it as an error in the text, but the manuscripts do not prove this; others suppose there was a town, in one tribe, named after another tribe, and refer this to Havoth-jair, see Num 32:41, near the Jordan. Dr. Thomson found a place near Banias marked by ruins and a tomb called by the Arabs Seid Yehuda, "My Lord Judah," which he believes is the site of ancient Judah upon Jordan, with its name perpetuated.