Extended Strong's Hebrew Lexicon (Brown-Driver-Briggs based)
Naphtuhim
Usage: People descended from Naphtuh(?) of the Egyptians, first mentioned at Gen.10.13; descended from Egypt (H4714); along with Ludim (H3866), Anamim (H6047), Lehabim (H3853), Pathrusim (H6625), Casluhim (H3695) and Caphtorim (H3732) § Naphtuhim = "openings" an unclear reference to Egypt; perhaps Lower Egypt