آذربایجان (Persian) comes 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 “آذربایجان”, step by step
آذربایجان traces back through 3 separate lines of ancestry.