Where does “Pănoiu” come from?

Pănoiu (Romanian) comes from Romanian pană, from Romanian peană, from Latin penna, from Proto-Italic petnā, from Proto-Indo-European péth₂r̥, from Proto-Indo-European peth₂- — to spread out; to fly.

Ancestry of “Pănoiu”, step by step

Step	Language	Word	Meaning
1	Romanian	pană	feather
2	Romanian	peană	—
3	Latin	penna	wing; feather, especially a flight-feather;...
4	Proto-Italic	petnā	feather; wing
5	Proto-Indo-European	péth₂r̥	wing; feather
6	Proto-Indo-European	peth₂-	to spread out; to fly

Every word from Proto-Indo-European peth₂- →Every word from Proto-Indo-European péth₂r̥ →Every word from Proto-Italic petnā →