Albert Barnes Commentary Numbers 32:12

"save Caleb the son of Jephunneh the Kenizzite, and Joshua the son of Nun; because they have wholly followed Jehovah." — Numbers 32:12 (ASV)

The Kenezite - Kenaz (Genesis 36:11) was the name of one of the “dukes of Edom:” but Israel and Edom were of kindred origin, and the use of similar names by the two peoples is not surprising.