Where does “orvietana” come from?

orvietana (Italian) comes from Italian -ana, from Spanish -ana, from Latin -ana, from Latin -anus, from Latin -um, from Proto-Italic *-om, from Proto-Indo-European *-oHom.

Ancestry of “orvietana”, step by step

Step	Language	Word	Meaning
1	Italian	-ana	-an, -y
2	Spanish	-ana	feminine singular of -ano
3	Latin	-ana	inflection of -ānus: ## nominative/vocative...
4	Latin	-anus	Of or pertaining to; -ian
5	Latin	-um	nominative neuter singular of -us; accusative...
6	Proto-Italic	*-om	—
7	Proto-Indo-European	*-oHom	—

Every word from Proto-Indo-European *-oHom →