Matthew Poole and continuators on Numbers 34:4

4 And your border shall turn from the south to the ascent of Akrabbim , and pass unto Zin: and the going forth thereof shall be from the south to Kadesh-Barnea , and shall go on to Hazar-addar , and pass on to Azmon .

Called Maaleh-akrabbim, Ios. 15. 3. which was at the south end of the salt or dead sea.

Or, on the south, i. e. proceeding onward towards the South.

Which was on the Southern part of Canaan, Numb. 13. 17.

Which in Ios. 15. 3. may seem distinguished into two places, Hezron and Addar, which here are united because peradventure they were contiguous or joyned together. Or, the village of Addar, and so this is the same place called Addar, Ios. 15. 3. and for Hezron, that may be another place here omitted and there supplied for more exactness.

Which is at the West end of the mount of Edom.