Where does “nosu” come from?

nosu (Fala) comes from Old Portuguese nosso, from Vulgar Latin nossus, from Latin nostrum, from Proto-Italic nosteros, from Proto-Indo-European nos, from Proto-Indo-European éǵh₂ — I.

nosu (Fala): First-person plural possessive determiner; our

Definitions

First-person plural possessive determiner; our

Ancestry of “nosu”, step by step

Step	Language	Word	Meaning
1	Old Portuguese	nosso	—
2	Vulgar Latin	nossus	—
3	Latin	nostrum	of us; partitive genitive of nōs; nominative...
4	Proto-Italic	nosteros	our
5	Proto-Indo-European	nos	—
6	Proto-Indo-European	éǵh₂	I

Every word from Proto-Indo-European éǵh₂ →Every word from Proto-Indo-European nos →Every word from Proto-Italic nosteros →