The surname Abello (and related forms) is interpreted, according to the main scholars, from an origin linked to ancient personal names. A. Bongioanni relates it to a given name of Hebrew origin, identified with Abele (Abel), a character from the Old Testament whose name was adopted early in Christian onomastics. Although it was not one of the most widespread names in Italy, its presence is documented and gave rise to various onomastic developments. The author also mentions documented forms such as Abellonio, recorded in Piedmont, whose interpretation has generated debate among researchers, without definitive consensus.

For his part, E. Rossoni agrees in pointing to an anthroponymic origin, indicating that these surnames probably derive from modifications of the name Abele. He also provides concrete documentation, such as the presence of a Giovanni Abello in 1678, dean of the community of Grosio, in the Valtellina, which confirms the antiquity and roots of the surname in areas of northern Italy.