Italian word avolo comes from Latin -olus, Proto-Indo-European *h₂ewh₂-, and later Latin avus (An ancestor. An old man. Grandfather.)
-olus (Latin)
*h₂ewh₂- (Proto-Indo-European)
avus (Latin)
An ancestor. An old man. Grandfather.
*aviolus (Latin)
(Vulgar Latin) grandfather.
avolo (Italian)