Where does “नस्तालीक़” come from?

नस्तालीक़ (Hindi) comes from Classical Persian نستعلیق.

Ancestry of “नस्तालीक़”, step by step

Step	Language	Word	Meaning
1	Classical Persian	نستعلیق	—

नस्तालीक़ — Etymology, Origin & Word History | Etymology Explorer