Plural of foreign origin, Naphtuchim, an Egyptian tribe -- Naptuhim.
H5320. Naphtuchim
נַפְתֻּחִים proper name, of a location Genesis 10:13 = 1 Chronicles 1:11 (ᵐ5 Νεφθαλ(ι)ειμ, but ᵐ5L in Chronicles Νεφθωσειμ; = ptmh±, the northern land, i.e. Lower Egypt, according to BrugschHierogl, WB. Suppl. 633, and especially ErmanZAW x (1890), 118, 119 reading פתמחים. Other conjectures see DiGn.
I. [נֵץ] see II. נצץ. II. נֵץ II. נצץ.