Charles Ellicott Commentary Genesis 22:21

"Uz his first-born, and Buz his brother, and Kemuel the father of Aram." — Genesis 22:21 (ASV)

Huz. —The same name as Uz in Genesis 10:23; Genesis 36:28, the Hebrew in all cases being ’Uz. For the various regions supposed to have been “the land of Uz,” see Notes on Job 1:1; Jeremiah 25:20.

Buz. —Probably he was the ancestor of Elihu (Job 32:2); but Buz, in Jeremiah 25:23, seems to have been a region in Idumea.

Kemuel, the father of Aram. —He was not the progenitor of the Aramaic race, but the ancestor of the family of Ram, to which Elihu belonged (Job 32:2), Ram being the same as Aram (Keil). If so, Buz and Kemuel must have coalesced into one tribe.