Where does “na” come from?

na (Old Portuguese) comes from Old Portuguese ena, from Old Portuguese a, from Latin Ad, from Latin illic, from Latin ille, from Latin olle, from Proto-Italic *olnos — that.

Ancestry of “na”, step by step

Step	Language	Word	Meaning
1	Old Portuguese	ena	—
2	Old Portuguese	a	to; towards; Alternative spelling of á
3	Latin	Ad	toward, to
4	Latin	illic	he, she, it, yonder, that, overthere; in that...
5	Latin	ille	that; those; "; demonstrative pronoun "; that...
6	Latin	olle	Archaic form of ille
7	Proto-Italic	*olnos	that

Words derived from “na”

na
nã
na hora
na
na
na
na

Every word from Proto-Italic *olnos →Every word from Latin olle →Every word from Latin ille →