Where does “Isa” come from?

Isa (Hausa) comes from Arabic عِيسَى, from Hebrew יְהוֹשֻׁעַ — Joshua.

Ancestry of “Isa”, step by step

Step	Language	Word	Meaning
1	Arabic	عِيسَى	Jesus
2	Hebrew	יְהוֹשֻׁעַ	Joshua

Isa — Etymology, Origin & Word History | Etymology Explorer