The Pulpit Commentary on Genesis 10:19

And the border of the Canaanites was from Sidon (its northern boundary), as thou comest—i.e. as thou goest, in the direction of—to Gerar,—between Kadesh and Shur (Genesis 20:1)—unto Gaza (now called Guzzeh, at the south-west corner of Palestine); as thou gout, unto Sodom, and Gomorrah, and Admah, and Zeboim (vide Genesis 19:24),—Callirrhoe (Hieronymus, Jerusalem Targum, Josephus, Rosenmüller, Keil, Kalisch); possibly a variation of Laish and Leshem, a Sidonian city near the sources of the Jordan (Murphy).