Where does “Al Ain” come from?

Al Ain (English) comes from Arabic عين, from Proto-Semitic *ʕayn-, from Proto-Afro-Asiatic ʕayVn-.

Ancestry of “Al Ain”, step by step

Step	Language	Word	Meaning
1	Arabic	عين	to appoint, to nominate; to define; to designate,...
2	Proto-Semitic	*ʕayn-	—
3	Proto-Afro-Asiatic	ʕayVn-	—

Al Ain — Etymology, Origin & Word History | Etymology Explorer