From BiblePortal Wikipedia

International Standard Bible Encyclopedia [1]

( חצרון , ḥecrōn , "enclosure"): On the South boundary of Judah between "Kadesh-barnea" and "Addar" (  Joshua 15:3 ); in the parallel passage ( Numbers 34:4 ) "Hazar-addar." The two places may have been near together. Conder suggests that the name survives in Jebel Hadhı̂reh , a mountain Northwest of Petra in the Tı̂h .