Where does “inga” come from?

inga (Norwegian Bokmål) comes from Norwegian Bokmål ingen, from Old Norse [[engi]], [[enginn]].

inga (Norwegian Bokmål): feminine singular of ingen

Definitions

Step	Language	Word	Meaning
1	Norwegian Bokmål	ingen	no; no one; nobody; nothing; neither; none
2	Old Norse	[[engi]], [[enginn]]	—

inga — Etymology, Origin & Word History | Etymology Explorer