Where does “aynda” come from?

aynda (Old Portuguese) comes from Latin inde, from Proto-Indo-European én — in.

Ancestry of “aynda”, step by step

Step	Language	Word	Meaning
1	Latin	inde	thence, from there; from, since; thenceforth
2	Proto-Indo-European	én	in

aynda — Etymology, Origin & Word History | Etymology Explorer