Where does “इंडोनेशिया” come from?

इंडोनेशिया (Hindi) comes from English Indonesia, from Ancient Greek νῆσος — island.

Ancestry of “इंडोनेशिया”, step by step

Step	Language	Word	Meaning
1	English	Indonesia	—
2	Ancient Greek	νῆσος	island

इंडोनेशिया — Etymology, Origin & Word History | Etymology Explorer