Where does “Atrax” come from?

Atrax (Translingual) comes from Latin atra, from Latin ater, from Proto-Indo-European h₂eh₁ter- — fire.

Ancestry of “Atrax”, step by step

Step	Language	Word	Meaning
1	Latin	atra	nominative feminine singular of āter; nominative...
2	Latin	ater	dull black ; dark; gloomy, sad, dismal, unlucky;...
3	Proto-Indo-European	h₂eh₁ter-	fire

Atrax — Etymology, Origin & Word History | Etymology Explorer