Genesis 36:31 - Ellicott's Commentary On The Whole Bible

The kings. — In the triumphal song of Moses on the Red Sea we still read of “dukes of Edom” (Exodus 15:15; but when Israel had reached the borders of their land, we find that Edom had then a king (Numbers 20:14). But in the list given here, no king succeeds his father, and probably these were petty monarchs, who sprang up in various parts of the country during a long period of civil war, in which the Horites were finally as completely conquered as were the Canaanites in Palestine under the heavy hands of Saul and Solomon. In the time of the dukes, there were also Horite dukes of the race of Seir, ruling districts mixed up apparently with those governed by the descendants of Esau. But all these now disappear.