The Scofield Bible Commentary, by Cyrus Ingerson Scofield, [1917], at sacred-texts.com
Genesis Chapter 36
Edom
Edom (called also "Seir,") (Gen 32:3); (Gen 36:8) is the name of the country lying south of the ancient kingdom of Judah, and extending from the Dead Sea to the Gulf of Akaba. It includes the ruins of Petra, and is bounded on the north by Moab. Peopled by descendants of Esau (Gen 36:1-9). Edom has a remarkable prominence in the prophetic word as (together with Moab) the scene of the final destruction of Gentile world-power in the day of the Lord. See "Armageddon"; (Rev 16:14); (Rev 19:21) and "Times of the Gentiles"; (Luk 21:24); (Rev 16:14).
Compare (Psa 137:7); (Oba 1:8-16); (Isa 34:1-8); (Isa 63:1-6); (Jer 49:14-22); (Eze 25:12-14).
Amalek
(See Scofield) - (Exo 17:8).
Horite
Literally, Rock dweller.
kings that reigned in the land of Edom
It is characteristic of Scripture that the kings of Edom should be enumerated before the kings of Israel. The principle is stated in (Co1 15:46). First things are "natural," man's best, and always fail; second things are "spiritual," God's things, and succeed.
Adam -- Christ;
Cain -- Abel;
Cain's posterity -- Seth's posterity;
Saul -- David;
Israel -- the true Church, etc.