Joshua 14:6

6.Then the children of Judah came, etc Here the account which had been begun as to the partition of the land is broken off to make way for the insertion of a narrative, namely, that Caleb requested Mount Hebron to be given to him as he had been promised by Moses. This happened a long time before the people had ceased from making war, and it became necessary to cast lots. It is stated to be the fifth year since their entrance into the land, and he does not ask for a locality to be given up to him which was already subdued and cleared of the enemy, but in the midst of the noise and heat of warfare, he asks to be permitted to acquire it by routing and slaying its giants. He only seeks to provide, that when his valor has subdued the giants, he is not to be defrauded of the reward of his labor. The method of so providing, is to prevent its being included in the common lot of a tribe. Accordingly, he does not put forth the claim by himself alone, but the members of his tribe, the sons of Judah also concur with him, because the effect of conferring this extraordinary benefit on one family was so far to make an addition to all. Hence though Caleb alone speaks, all the tribe whose interest it was that his request should be granted were present.

I am not clear why the surname of Kenite was given to Caleb. He is so called also in Numbers 32:0. I am not unaware of the conjecture of some expositors, that he was so surnamed from Kenas, because either he himself or some one of his ancestors dwelt among the Kenites. But I see no solid foundation for this. What if he gained this title by some illustrious deed, just as victors sometimes assume a surname from the nations they have subdued? As the promise had not been inserted into any public record, and Joshua was the only witness now surviving, he makes his application to him. And it is probable that when the ten spies made mention of the names of the Anakim, with the view of terrifying the people, Caleb, to refute their dishonesty, answered with truth, that when he beheld them on Mount Hebron, they were so far from being terrible, that he would attack them at his own hand, provided that on their expulsion he should succeed to their lands; and that on these conditions Moses ceded to him a habitation in that locality which he should have acquired by his own prowess.