Where does “Alborz” come from?

Alborz (English) comes from Persian البرز, from Middle Persian hlbwlc, from Old Persian Harā Brzatī, from Proto-Iranian Harā Bṛzatī.

Ancestry of “Alborz”, step by step

Step	Language	Word	Meaning
1	Persian	البرز	—
2	Middle Persian	hlbwlc	the mountain range surrounding the world
3	Old Persian	Harā Brzatī	high mountain
4	Proto-Iranian	Harā Bṛzatī	—

Alborz — Etymology, Origin & Word History | Etymology Explorer