From Proto-Indo-European *Hyós.
*Hyás
- that, who, which (relative pronoun)
- Proto-Indo-Aryan: *Hyás
- Sanskrit: यद् (yád), यः (yáḥ, masc.nom.sg.)[1]
- Sauraseni Prakrit: [script needed] (jo, masc.nom.sg.)
- Hindi: जो (jo)
- Punjabi: ਜੋ (jo)
- Proto-Iranian: *Hyáh
- Avestan: 𐬫𐬋 (yō)
- Northern Kurdish: yê, ê, -yê, -ê, ya, a, -ya, -a
- Middle Persian: Y (ī)
- Persian: ی (ezafe particle)
- ^ Turner, Ralph Lilley (1969–1985) “yá”, in A Comparative Dictionary of the Indo-Aryan Languages, London: Oxford University Press