John Gill Commentary 1 Chronicles 2:51

"Salma the father of Beth-lehem, Hareph the father of Beth-gader." — 1 Chronicles 2:51 (ASV)

Salma the father of Bethlehem
Or prince of Bethlehem, as the Targum; not the same as in (1 Chronicles 2:11) he was the son of Nahshon, this of the younger Caleb:

Hareph, the father of Bethgader ;
prince of a place of that name called Gedor, (1 Chronicles 4:4) , and where this man's name is Penuel; Gedor was in the tribe of Judah, (Joshua 15:58) .