Where does “Coșuleanu” come from?

Coșuleanu (Romanian) comes from Romanian Coșula, from Romanian -ă, from Latin illa, from Latin ille, from Latin olle, from Proto-Italic *olnos — that.

Ancestry of “Coșuleanu”, step by step

Step	Language	Word	Meaning
1	Romanian	Coșula	—
2	Romanian	-ă	Forms certain female equivalent nouns
3	Latin	illa	nominative feminine singular of ille; nominative...
4	Latin	ille	that; those; "; demonstrative pronoun "; that...
5	Latin	olle	Archaic form of ille
6	Proto-Italic	*olnos	that

Every word from Proto-Italic *olnos →Every word from Latin olle →Every word from Latin ille →