Where does “ȷ́ás” come from?

ȷ́ás (Proto-Indo-Iranian) comes from Proto-Indo-European ǵenh₁- — to produce, to beget, to give birth.

Ancestry of “ȷ́ás”, step by step

Step	Language	Word	Meaning
1	Proto-Indo-European	ǵenh₁-	to produce, to beget, to give birth

ȷ́ás — Etymology, Origin & Word History | Etymology Explorer