Where does “bos” come from?

bos (Guinea-Bissau Creole) comes from Portuguese vós, from Old Portuguese vos, from Latin vōs, from Old Latin vōs, from Proto-Italic wōs, from Proto-Indo-European *yúHs — you (plural).

bos (Guinea-Bissau Creole): you

Definitions

Ancestry of “bos”, step by step

Step	Language	Word	Meaning
1	Portuguese	vós	you; you; thou; plural of vó
2	Old Portuguese	vos	—
3	Latin	vōs	you, ye, you all
4	Old Latin	vōs	—
5	Proto-Italic	wōs	you
6	Proto-Indo-European	*yúHs	you (plural)

Every word from Proto-Indo-European *yúHs →Every word from Proto-Italic wōs →Every word from Old Latin vōs →