Where does “Абадан” come from?

Абадан (Russian) comes from Persian آبادان, from Classical Persian آبَادَان.

Ancestry of “Абадан”, step by step

Step	Language	Word	Meaning
1	Persian	آبادان	cultivated or inhabited place; cultivated,...
2	Classical Persian	آبَادَان	—

Абадан — Etymology, Origin & Word History | Etymology Explorer