Where does “чийто” come from?

чийто (Bulgarian) comes from Bulgarian чий, from Old Church Slavonic чии, from Proto-Slavic čьjь, from Proto-Balto-Slavic *kijas.

чийто (Bulgarian): whose as a relative pronoun

Definitions

  1. whose as a relative pronoun

Ancestry of “чийто”, step by step

StepLanguageWordMeaning
1Bulgarianчийwhose in direct or indirect questions
2Old Church Slavonicчииwhose
3Proto-Slavicčьjьwhose
4Proto-Balto-Slavic*kijas—
Every word from Proto-Balto-Slavic *kijas →Every word from Proto-Slavic čьjь →Every word from Old Church Slavonic чии →