How did Mt Elbrus get its name?

The name Elbrus is a metathesis of The name is derived from that of a legendary mountain in Iranian mythology.[6] reflects Proto- *Bṛzatī is the feminine form of the adjective *bṛzant-"high", the reconstructed ancestor of modern Kurdish "barez" (high, tall) and modern Persian boland (بلند) and Barz/Berazandeh.[6] Harā may be interpreted as "watch" or "guard", from an Indo-European root *ser-"protect".[6] In Middle PersianBərəzaitī became Harborz, Modern Persian which is cognate with Elbrus