Where does “ـها” come from?

ـها (Persian) comes from Middle Persian 𐭩𐭧𐭠 — Used to form plurals.

Ancestry of “ـها”, step by step

Step	Language	Word	Meaning
1	Middle Persian	𐭩𐭧𐭠	Used to form plurals

ـها — Etymology, Origin & Word History | Etymology Explorer