There are several place names in Italy which have the name Cavellaro, they are
The name is either a variant of name Cavaliere, which is Italian: from cavaliere ‘knight’, ‘horseman’ (from Late Latin caballarius), possibly a status name or an occupational name for the servant of a knight or an occupational name for a keeper, dealer or breeder of horses. The name has many derivatives, the relative form Cavalieri was first known in Ferrara, one of the most prosperous cities in antiquity as early as the 9th Century, when Giovanni Cavalieri defended his lands against the Venetians. For more information go to http://www.cavallaro.com.br/