Where does “چاچو” come from?

چاچو (Urdu) comes from Urdu و, from Classical Persian و, from Middle Persian 𐭠𐭥𐭣, from Old Persian 𐎢𐎫𐎠, from Proto-Indo-Iranian Hutá, from Proto-Indo-Iranian Hu, from Proto-Indo-European h₂ew, from Proto-Indo-European ǵʰe — Postpositional intensifying particle: indeed, at any rate, in fact.

Ancestry of “چاچو”, step by step

چاچو traces back through two separate lines of ancestry.

via Urdu و

StepLanguageWordMeaning
1Urduوand
2Classical Persianو
3Middle Persian𐭠𐭥𐭣
4Old Persian𐎢𐎫𐎠and
5Proto-Indo-IranianHutá
6Proto-Indo-IranianHu
7Proto-Indo-Europeanh₂ewaway from, off; again
8Proto-Indo-EuropeanǵʰePostpositional intensifying particle: indeed, at any rate, in fact

via Urdu چاچا

StepLanguageWordMeaning
1Urduچاچا
Every word from Proto-Indo-European ǵʰeEvery word from Proto-Indo-European h₂ewEvery word from Proto-Indo-Iranian Hu