Where does “यः” come from?

यः (Sanskrit) comes from Proto-Indo-Aryan Hyás, from Indo-Iranian *Hyás, from Proto-Indo-European Hyós — who, which; already.

Ancestry of “यः”, step by step

यः traces back through two separate lines of ancestry.

via Proto-Indo-Aryan Hyás

StepLanguageWordMeaning
1Proto-Indo-AryanHyás—
2Indo-Iranian*Hyás—
3Proto-Indo-EuropeanHyóswho, which; already

via Proto-Sino-Tibetan b-jəw-n ~ bwəj

StepLanguageWordMeaning
1Proto-Sino-Tibetanb-jəw-n ~ bwəjrat, bamboo rat; rabbit, hare

Words derived from “यः”

Every word from Proto-Indo-European Hyós →Every word from Indo-Iranian *Hyás →Every word from Proto-Indo-Aryan Hyás →