Libnah - See the note on Joshua 10:29.
Ether - From Joshua 19:7 we learn that this city was afterwards given to the tribe of Simeon.

Libnah,.... Here begins another division or list of the cities of Judah, in the valley or plain. Libnah is the same with Libnah, a royal city; see Joshua 10:29,
and Ether was given to the tribe of Simeon, Joshua 19:7; and under Ether of the lot of Simeon, Jerom writes (y), there is now a very large village called Jethira, in interior Daroma, near Malatha, twenty miles from Eleutheropolis:
and Ashan also was given to the tribe of Simeon, Joshua 19:7; and the above writer relates (z), that there was in his times a village called Bethasan, belonging to Aelia, or Jerusalem, fifteen miles from it.
(y) De loc. Hebrews. fol. 91. C. & 92. I. (z) De loc. Hebrews. fol. 88. G.

Libnah: see at Joshua 10:29. Ether and Ashan, which were afterwards given to the Simeonites (Joshua 19:7), and are probably to be sought for on the border of the Negeb, have not yet been discovered. The conjecture that Ether is connected with the ruins of Attrah (Rob. iii. App.) in the province of Gaza, is a very uncertain one. Ashan, probably the same as Kor-ashan (1-Samuel 30:30), became a priests' city afterwards (1-Chronicles 6:44; see at Joshua 21:16).