Italian word anello comes from Proto-Indo-European *h₁eh₂no-, and later Latin anulus (A ring, especially a finger ring. A signet ring.)
*h₁eh₂no- (Proto-Indo-European)
anus (Latin)
an anus. a ring.
anulus (Latin)
A ring, especially a finger ring. A signet ring.
anellus (Latin)
A little ring.
anello (Italian)
(botany) ring, growth ring. (heraldiccharge) annulet. (in the plural, gymnastics) rings. (mycology) annulus. Link (of a chain). Ring.