Where does “コーカサス” come from?

コーカサス (Japanese) comes from English Caucasus, from Latin Caucasus, from Ancient Greek Καύκασος, from Proto-Scythian xrohukäsi — ice-shining, white with snow.

Ancestry of “コーカサス”, step by step

Step	Language	Word	Meaning
1	English	Caucasus	—
2	Latin	Caucasus	—
3	Ancient Greek	Καύκασος	—
4	Proto-Scythian	xrohukäsi	ice-shining, white with snow

Every word from Proto-Scythian xrohukäsi →

コーカサス — Etymology, Origin & Word History | Etymology Explorer