C. F. Keil and Franz Delitzsch on 1 Chronicles 2:46

1Ch 2:46 Descendants of Caleb by two concubines. - The name עיפה occurs in 1Ch 2:47 and 1Ch 1:33 as a man’s name. Caleb’s concubine of this name bore three sons: Haran, of whom nothing further is known; Moza, which, though in Jos 18:26 it is the name of a Benjamite town, is not necessarily on that account the name of a town here; and Gazez, unknown, perhaps a grandson of Caleb, especially if the clause “Haran begat Gazez” be merely an explanatory addition. But Haran may also have given to his son the name of his younger brother, so that a son and grandson of Caleb may have borne the same name.