Kirjatharba was the early name of Hebron. Scripture repeatedly identifies the two names as referring to the same city.
Definition
Kirjatharba, meaning “city of Arba,” was the early name of the city later generally known as Hebron. The two names refer to the same city in the biblical records.
Biblical Usage
Scripture repeatedly identifies Kirjath-arba with Hebron, including accounts concerning Abraham, the patriarchs, Judah’s inheritance, and the cities of refuge and the Levites.
Historical Background
Kirjatharba was an earlier designation of Hebron, while Hebron became the usual name after the conquest.
Historical Bible Dictionaries
Smith's Bible Dictionary
(the city of Arba), an early name of the city which after the conquest is generally known as Hebron. (Joshua 14:15; Judges 1:10) The identity of Kirjath-arba with Hebron is constantly asserted. (Genesis 23:2; 35:27; Joshua 14:15; 15:13,54; 20:7; 21:11)