Smith's Bible Dictionary (1863)
(bone), a city in the extreme south of Judah, (Joshua 15:29) afterwards allotted to Simeon. (Joshua 19:3) Elsewhere it is Ezem.
Hastings' Dictionary of the Bible (1898) & Schaff's Bible Dictionary
A'ZEM (bone), a city in the south of Judah, Josh 16:29; afterward allotted to Simeon, Josh 19:3; the same as Ezem in 1 Chr 4:29.