Genesis 36:1

Edom. His genealogy extends as far as ver. 20, where that of Seir, the Horrite, begins. The seven first verses specify Esau's sons, the twelve next his grandsons born in Seir. From the 15th to the 20th verse, we have the most ancient form of government in that nation under the Aluphim, or heads of families. To them succeed kings, (ver. 31 to 40,) and then dukes to the end. Moses omits several generations of Oolibama's grand-children, as foreign to his purpose, which was to shew the Israelites whom they were not to molest. The kings, of whom he speaks, (ver. 31,) might govern different parts of the country at the same time; and that before any form of government was established among the Hebrews, as it was under Moses, who is styled a king, (Deuteronomy xxxiii. 5,) about 200 years after Esau had driven the Horrites from their mountains. (Calmet) --- Among these nations several good men might exist, as Job, &c. But the true religion was preserved more fully among the 12 tribes. (St. Augustine, City of God xv. xvi.) (Worthington)