Genesis 10:18

And the Arvadite, and the Zemarite, and the Hamathite: and afterward were the families of the Canaanites spread abroad.

1. The Arvadites, Zemarites and Hamathites descended from Canaan.
2. Canaan may have had sons named Arvad, Zemar and Hamath.
3. Eventually, Canaan's posterity spread far and wide.
4. As families grow they begin to spread out and lose touch with each other. This is not just a modern phenomenon, but occurred anciently.