The Kenizzites.--The chief fact of importance connected with this race is that Caleb was a Kenezite (Numbers 32:12). Apparently with his clan he joined the Israelites at the Exodus, and was numbered with the tribe of Judah. Kenizzite and Kenezite are two ways of spelling the same Hebrew word, the former being right.
The Kadmonites.--This may mean either an eastern or an ancient people, of whom we know nothing.
For the Perizzites see Genesis 13:7; for the Rephaims, Genesis 14:5; and for the rest, Genesis 10:15-18.
Matthew Henry's Concise Commentary15:17-21 The smoking furnace and the burning lamp, probably represented the Israelites' severe trials and joyful deliverance, with their gracious supports in the mean time. It is probable that this furnace and lamp, which passed between the pieces, burned and consumed them, and so completed the sacrifice, and testified God's acceptance of it. So it intimates that God's covenants with man are made by sacrifice, Ps 50:5. And we may know that he accepts our sacrifices, if he kindles in our souls pious and devout affections. The bounds of the land granted are stated. Several nations, or tribes, are spoken of, that must be cast out to make room for the seed of Abram. In this chapter we perceive in Abram faith struggling against, and triumphing over, unbelief. Wonder not, believers, if you meet with seasons of darkness and distress. But it is not the will of God that you should be cast down: fear not; for all that he was to Abram he will be to you.Gill's Exposition of the Entire BibleThe Kenites, and the Kenizzites, and the Kadmonites. In this and the following verses ten nations are reckoned as occupying the land of Canaan at this time, whereas only seven are mentioned in the times of Moses and Joshua; and these three are not among them, and seem before those times to have been extinct, or were mixed with the other nations, and were no more distinct ones; though Aben Ezra thinks these people had two names, and Jarchi interprets them of the Edomites, Moabites, and Ammonites, who shall be the inheritance of the children of Israel in future times, according to Isaiah 11:14; and so the Jerusalem Talmud (t), from whence he seems to have taken it; and some are of opinion that the Midianites are meant by the Kenites, since Jethro, Moses's father in law, who was of Midian, is called the Kenite, as was also Heber, who was of the same race, Judges 1:16; there were Kenites near to the Amalekites in the times of Balaam, and who dwelt among them in the times of Saul, Numbers 24:20; as there were also some of this name that descended from the father of the house of Rechab, or the Rechabites, who were associates and proselytes to the people of Israel, 1 Chronicles 2:55; the Kenizzites are supposed by some to be the descendants of Kenaz, a grandson of Esau, Genesis 36:11; but then they must be so called here by anticipation, since Kenaz was not now born, and rather then would have had the name of Kenazites; besides, none of the land of the children of Esau, at least of those that dwelt about Mount Seir, was to be given to the children of Israel, Deuteronomy 1:5; could indeed the Edomites or Idumeans be intended, it might be thought this had its accomplishment in the times of David, and more especially when the Idumeans became Jews, embraced their religion, and were one people with them, in the times of Hyrcanus (u): the Kadmonites, or the Orientals, were, as Bochart (w) very probably thinks, the Hivites, who inhabited the eastern part of the land of Canaan about Mount Hermon, and from thence might have their name, as they are in the Jerusalem Targum called the children of the east; and hence came the names of Cadmus and Hermione his wife, who were Hivites, and the fable of their being turned into serpents, which the word Hivites signifies. (t) Sheviith, fol. 37. 2.((u) Joseph Antiqu. l. 13. c. 9. sect. 1.((w) Canaan, l. 1. c. 19. col. 447.
(t) Sheviith, fol. 37. 2.((u) Joseph Antiqu. l. 13. c. 9. sect. 1.((w) Canaan, l. 1. c. 19. col. 447.