Where does “*mei” come from?

*mei (Old Portuguese) comes from Latin meus, from Proto-Italic meos — my.

Ancestry of “*mei”, step by step

Step	Language	Word	Meaning
1	Latin	meus	my, mine
2	Proto-Italic	meos	my

Words derived from “*mei”

mei

Every word from Proto-Italic meos →Every word from Latin meus →