- Proto-Hindo-Ewropaki ra *ekto-ti- ("heştay")
- Proto-Aryaki ra
- Ewıstki: aštāiti- ("heştay")
- Pehlewki: haštad ("heştay")
- Farski: haštad ("heştay")
- Kurmancki: haštē ("heştay") (< Farski ra)
- (Zazaki: haštāy) Alfabeyê Ariki
- Sanskritki: aśītih- ("heştay")
- Horn, Paul. Dictionary of Persian Etymology (Strassburg, 1893),
- Julius Pokorny's Indo-European Etymological Dictionary
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