Boyd’s Bible Dictionary:
Inhabitants of Zorah; but the designation seems to be limited to the family of Judah descended from Shobal (1 Chron. 4:2).
Concise Bible Dictionary:
Family descended from Shobal, son of Judah: probably so called because of inhabiting Zorah (1 Chron. 4:2). Called ZAREATHITES in 1 Chronicles 2:53.
Jackson’s Dictionary of Scripture Proper Names:
same as Zareathites