Italian surnames in old records from XVIth century onwards are written in latin even if they derive from local or regional dialects. So they were latinized and generally only in 19th century they were italianized. Perhaps I am wrong, but in Ireland it happened one similar thing: many Irish surnames have been englicized. In Italian "pelli" could mean "skin" and in old italian "core" could be "heart" could it be a nickname? I am not sure. In Southern Italy surnames are sometimes influenced by local greek dialects (Sicily, Calabria and Apulia especially): Greek is completely different from latin. But in the beginning even the greek surnames have been latinized.