Where does “adreit” come from?

adreit (Old Occitan) comes from Old Occitan a, from Latin Ad, from Latin illic, from Latin ille, from Latin olle, from Proto-Italic *olnos.

Ancestry of “adreit”, step by step

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

adreit — Etymology, Origin & Word History | Etymology Explorer