From BiblePortal Wikipedia

Hastings' Dictionary of the Bible [1]

Hazor-Hadattah . The text (  Joshua 15:25 ) is not beyond suspicion. If it is correct, the name may mean ‘new Hazor.’ The place was in the Negeb of Judah, but the site is unknown.

Easton's Bible Dictionary [2]

 Joshua 15:25

Cyclopedia of Biblical, Theological and Ecclesiastical Literature [3]

( Joshua 15:25) is identified by Tristram (Bible Places, page 18) with "the ruins called Aldaddah, a watch-tower on the edge of a bluff on the high ground at the head of the Zuweirah valley, southwest of the Dead Sea." This point is beyond the bounds of the Ordnance Map, but is situated in the same direction as the el-Hutdeirah, with which we have identified the place, and where Saunders locates an imaginary Hazor-Kinah (adopting the suggestion of Tristram, Bible Places, page 16) and also Jagur (q.v.). (See Judah).

International Standard Bible Encyclopedia [4]

hā´zor - ha - dat´a (Aramaic f Judah toward the border of Edom" (  Joshua 15:25 ). Eusebius and Jerome describe a "New Hazor" to the East of Ascalon, but this is too far North.