Antonello is a diminutive form of the name Antonio, which itself is derived from the Latin name Antonius. The name Antonius is believed to have Etruscan origins, and its meaning is often associated with 'priceless' or 'of inestimable worth.' Antonello, as a diminutive, carries a sense of endearment or familiarity, often used to denote a younger or smaller version of Antonio.