Strong's Definition
plural of foreign origin, Naphtuchim, an Egyptian tribe
KJV Usage: Naptuhim
STEPBible — Tyndale Abridged Hebrew Lexicon
נַפְתֻּחִים (naph.tu.chim) — Naphtuhim. 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
UBS Dictionary of Biblical Hebrew
UBS Dictionary of Biblical Hebrew © United Bible Societies, licensed CC BY-SA 4.0.
Brown-Driver-Briggs Hebrew Lexicon
נַפְתֻּחִים n.pr.loc. the northern land, i.e. Lower Egypt base