John Gill Commentary 1 Samuel 30:29

"and to them that were in Racal, and to them that were in the cities of the Jerahmeelites, and to them that were in the cities of the Kenites," — 1 Samuel 30:29 (ASV)

And to them which were in Rachal
Another city of the tribe of Judah, but nowhere else spoken of:

and to them which were in the cities of the Jerahmeelites :
which lay to the south of Judah, (1 Samuel 27:10) ;

and to them which were in the cities of the Kenites ;
who dwelt in the wilderness of Judah, in the south of Arad, (Judges 1:16) .