Where does “ná” come from?

ná (Proto-Iranian) comes from Proto-Indo-Iranian ná, from Proto-Indo-European né — not; no.

Ancestry of “ná”, step by step

Step	Language	Word	Meaning
1	Proto-Indo-Iranian	ná	no, not
2	Proto-Indo-European	né	not; no

ná — Etymology, Origin & Word History | Etymology Explorer