Where does “orlino” come from?

orlino (Italian) comes from Italian orlo, from Vulgar Latin orulus, from Latin ōra, from Latin ōs, from Proto-Italic ōs, from Proto-Indo-European h₃ésth₁ — bone.

Ancestry of “orlino”, step by step

Step	Language	Word	Meaning
1	Italian	orlo	border, edge, margin, brink, verge; the milled...
2	Vulgar Latin	orulus	—
3	Latin	ōra	border, rim, frontier, limit, edge
4	Latin	ōs	mouth
5	Proto-Italic	ōs	mouth
6	Proto-Indo-European	h₃ésth₁	bone

Every word from Proto-Indo-European h₃ésth₁ →Every word from Proto-Italic ōs →Every word from Latin ōs →