John Gills Exposition of the Bible Commentary - Genesis 36:40
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, in and over their respective families: and it may be observed, that neither Esau, nor his sons by his two first wives, Eliphaz and Reuel, are called dukes,... read more
Matthew Henry's Complete Commentary - Genesis 36:31-42
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. These kings reigned in Edom before there reigned any king over the children of Israel, that is, before Moses's time, for he was king in Jeshurun, Deut. 33:5. God had lately promised Jacob that kings... read more