Where does “Əlaəddin” come from?

Əlaəddin (Azerbaijani) comes from Arabic عَلَاء الدِّين — nobility of the faith.

Ancestry of “Əlaəddin”, step by step

Step	Language	Word	Meaning
1	Arabic	عَلَاء الدِّين	nobility of the faith

Əlaəddin — Etymology, Origin & Word History | Etymology Explorer