Where does “inn” come from?

inn (Réunion Creole French) comes from French un, from Middle French un, from Old French un, from Latin ūnus, from Old Latin oinos, from Proto-Italic oinos, from Proto-Indo-European óynos — one; single.

inn (Réunion Creole French): one

Definitions

Ancestry of “inn”, step by step

Step	Language	Word	Meaning
1	French	un	an, a; one
2	Middle French	un	a, an; one
3	Old French	un	a, an; one
4	Latin	ūnus	one, single
5	Old Latin	oinos	one
6	Proto-Italic	oinos	cardinal number 1 Previous: n/a Next: *duō;...
7	Proto-Indo-European	óynos	one; single

Every word from Proto-Indo-European óynos →Every word from Proto-Italic oinos →Every word from Old Latin oinos →