Where does “yo” come from?

yo (Chavacano) comes from Spanish yo, from Old Spanish yo, from Late Latin eo, from Classical Latin egō̆, from Proto-Italic egō, from Proto-Indo-European éǵh₂ — I.

yo (Chavacano): I 1st person nominative pronoun

Definitions

I 1st person nominative pronoun

Ancestry of “yo”, step by step

Step	Language	Word	Meaning
1	Spanish	yo	I; Freud's concept of the ego
2	Old Spanish	yo	—
3	Late Latin	eo	—
4	Classical Latin	egō̆	—
5	Proto-Italic	egō	I
6	Proto-Indo-European	éǵh₂	I

Every word from Proto-Indo-European éǵh₂ →Every word from Proto-Italic egō →Every word from Classical Latin egō̆ →