Where does “mēne” come from?

mēne (Latin) comes from Latin mē, from Proto-Indo-European éǵh₂ — I.

Ancestry of “mēne”, step by step

Step	Language	Word	Meaning
1	Latin	mē	—
2	Proto-Indo-European	éǵh₂	I

mēne — Etymology, Origin & Word History | Etymology Explorer