A town, along with Azmon, that marked the southern border of Judah (Numbers 34:4). It is usually identified with Khirbet el-Qudeirat near Kadesh-barnea.
The parallel passage in Joshua 15:3–4 lists four places instead of two:
Some have suggested that Hazar-addar and Addar are the same place. Others think they renamed it Hezron to distinguish it from Addar.