Where does “Háydʰas” come from?

Háydʰas (Proto-Indo-Aryan) comes from Proto-Indo-Iranian Háydʰas, from Proto-Indo-European h₂éydʰ-o-s, from Proto-Indo-European h₂eydʰ- — to ignite; fire.

Ancestry of “Háydʰas”, step by step

StepLanguageWordMeaning
1Proto-Indo-IranianHáydʰas
2Proto-Indo-Europeanh₂éydʰ-o-s
3Proto-Indo-Europeanh₂eydʰ-to ignite; fire
Every word from Proto-Indo-European h₂eydʰ-Every word from Proto-Indo-European h₂éydʰ-o-sEvery word from Proto-Indo-Iranian Háydʰas