Husham died, and Hadad the son of Bedad, who defeated Midian in the country of Moab, reigned in his place, the name of his city being Avith.
By degrees, it seems, the Edomites wormed out the Horites, obtained full possession of the country, and had a government of their own. 1. They were ruled by kings, who governed the whole country, and seem to have come to the throne by election, and not by lineal descent; so bishop Patrick observes.
Commenting on Genesis 36:31-43
And these are the names of the dukes that came of Esau,.... After the regal monarchy ceased, the government in Edom was by dukes, and of these there were two sons, one of which an account has been given of already, who were partly of the race of Seir, and partly of the race of Esau; and who were dukes not by succession, but together...
Smote Midian in the field of Moab - Bishop Cumberland supposes that this was Midian, the son of Abraham by Keturah, and that he was killed by Hadad some time before he was one hundred and nine years of age; and that Moses recorded this, probably, because it was a calamity to the ancestor of Jethro, his father-in-law - Orig. of Nat., p. 14.