According to an alternate etymology, the name of Azerbaijan derives from that of Atropates, a Persian satrap under the Achaemenid Empire, who was later reinstated as the satrap of Media under Alexander the Great. The original etymology of this name is thought to have its roots in the once-dominant Zoroastrian religion. In the Avesta, Frawardin Yasht (“Hymn to the Guardian Angels”), there is a mention of âterepâtahe ashaonô fravashîm ýazamaide, which literally translates from Avestan as “we worship the Fravashi of the holy Atropatene”.
Atropates ruled over the region of Atropatene (present Azerbaijan). The name “Atropates” itself is the Greek transliteration of an Old Iranian, probably Median, compounded name with the meaning “Protected by the (Holy) Fire” or “The Land of the (Holy) Fire”. The Greek name is mentioned by Diodorus Siculus and Strabo. Over the span of millennia the name evolved to Āturpātākān then to Ādharbādhagān, Ādharbāyagān, Āzarbāydjān and present-day Azerbaijan. The word is translatable as “The Treasury” and “The Treasurer” of fire or “The Land of the Fire” in Modern Persian.