Where does “Azerbaidjan” come from?

Azerbaidjan (Romanian) comes from Azerbaijani Azərbaycan, from Classical Persian آذَرْبَایْجَان, from Arabic أَذَرْبَيْجَان, from Persian آذربادگان.

Ancestry of “Azerbaidjan”, step by step

Step	Language	Word	Meaning
1	Azerbaijani	Azərbaycan	Azerbaijan
2	Classical Persian	آذَرْبَایْجَان	—
3	Arabic	أَذَرْبَيْجَان	—
4	Persian	آذربادگان	—