Where does “इलाहाबाद” come from?

इलाहाबाद (Hindi) comes from Persian الله‌آباد, from Arabic اَللّٰه, from Proto-Semitic ʾil- — deity; god.

Ancestry of “इलाहाबाद”, step by step

Step	Language	Word	Meaning
1	Persian	الله‌آباد	—
2	Arabic	اَللّٰه	Allah; God
3	Proto-Semitic	ʾil-	deity; god