Mount Seir; not that of Edom, but another so called from some resemblance it had with that in quality. Bethshemesh: there were divers cities of this name; this in Judah here, and Joshua 21:16 2 Kings 14:11, another in Issachar, and a third in Naphtali, Joshua 19:22,38.
Related Commentaries of Joshua 15:10
Joshua 15:10
10 And the border compassed from Baalah westward unto mount Seir, and passed along unto the side of mount Jearim, which is Chesalon, on the north side, and went down to Bethshemesh, and passed on to Timnah: