Lachish - and Eglon - See on Joshua 10:3 (note).

Lachish,.... Lachish and Eglon were royal cities, of which see Joshua 10:3,
and Bozkath, is called Boscath, of which place was the mother of King Josiah, 2-Kings 21:1; some take it to be the same with Bascana, as in the Apocrypha:"And when he came near to Bascama he slew Jonathan, who was buried there.'' (1 Maccabees 13:23)
and Eglon also was a royal city, of which see Joshua 10:3.

Lachish, i.e., Um Lakis (see at Joshua 10:3). Bozkath is unknown: according to Knobel, it may possibly be the ruins of Tubakah, on the south of Um Lakis and Ajlan (Rob. ii. pp. 388, 648). Eglon, i.e., Ajlan; see at Joshua 10:3.