onsina is the plural essive of onsi.

onsiN

Norwegian Bokmål

huleN; hulromN

Kven – Norwegian Bokmåldict-fkv-nob/src/N_fkvnob.xml:50270Edit on GitHub Suggest

Case	Sg	Pl
Nom	onsi	onnet
Gen	onnen	ontitten / onssiin / onsitten / onsiin
Par	ontta	ontia / onssii / onsia / onsii
Ill	ontheen	onshiin
Ine	onnessa	onsissa
Ela	onnesta	onsista
Ade	onnela	onsila
Abl	onnelta	onsilta
All	onnelet / onnele	onsilet / onsile
Abe	onnetta	onsitta
Ess	ontena	onsina
Tra	onneksi	onsiksi
Com		onsine