Kommentar zu Bamidbar 13:6

כלב בן יפונה, “Caleb son of Yefuneh.” He is identical with Caleb son of Chetzron, and the reason he is here called the son of Yefuneh, is because he turned aside (פנה) from all but one of the other spies. [Chetzron had been a grandson of Yehudah, Genesis 46,12, compare also Chronicles I 2,18. Ed.]