Where does “Kaukazas” come from?

Kaukazas (Lithuanian) comes from Russian Кавка́з, from French Caucase, from Latin Caucasus, from Ancient Greek Καύκασος, from Proto-Scythian xrohukäsi — ice-shining, white with snow.

Ancestry of “Kaukazas”, step by step

Step	Language	Word	Meaning
1	Russian	Кавка́з	Caucasus
2	French	Caucase	Caucasus (geographic region)
3	Latin	Caucasus	Caucasus
4	Ancient Greek	Καύκασος	Caucasus
5	Proto-Scythian	xrohukäsi	ice-shining, white with snow

Every word from Proto-Scythian xrohukäsi →Every word from Ancient Greek Καύκασος →Every word from Latin Caucasus →