Where does “allá” come from?

allá (Asturian) comes from Latin Ad, from Latin illic, from Latin ille, from Latin olle, from Proto-Italic *olnos.

allá (Asturian): there

Definitions

Step	Language	Word	Meaning
1	Latin	Ad	—
2	Latin	illic	he, she, it, yonder, that, overthere; in that...
3	Latin	ille	that; those; "; demonstrative pronoun "; that...
4	Latin	olle	Archaic form of ille
5	Proto-Italic	*olnos	—

allá — Etymology, Origin & Word History | Etymology Explorer