Where does “Азербайджан” come from?

Азербайджан (Bulgarian) comes from Persian آذربایجان, from Ancient Greek Ἀτροπατηνή, from Ancient Greek Ἀτροπατηνός, from Ancient Greek -ηνός, from Ancient Greek -νός, from Proto-Indo-European dʰeh₁- — to do, put, place.

Ancestry of “Азербайджан”, step by step

Step	Language	Word	Meaning
1	Persian	آذربایجان	—
2	Ancient Greek	Ἀτροπατηνή	—
3	Ancient Greek	Ἀτροπατηνός	Atropatene, Atropatian, Atropatenian (person)
4	Ancient Greek	-ηνός	-ian, -ese
5	Ancient Greek	-νός	Alternative form of -νος
6	Proto-Indo-European	dʰeh₁-	to do, put, place

Every word from Proto-Indo-European dʰeh₁- →Every word from Ancient Greek -ηνός →Every word from Ancient Greek Ἀτροπατηνός →