Where does “ی” come from?

ی (Persian) comes from Arabic ي, from Proto-Semitic ʿayn-, from Hebrew עַיִן — eye.

ی (Persian): the grammatical particle ezafe; see...

Definitions

Step	Language	Word	Meaning
1	Arabic	ي	bound object pronoun: me, my; The nisba suffix,...
2	Proto-Semitic	ʿayn-	eye
3	Hebrew	עַיִן	eye

ی — Etymology, Origin & Word History | Etymology Explorer