Cognomen Duillio (Duillio 
) , throughout the world, is an extremely rare last name. The cognomen Duillio is characteristic of Latin America and the Caribbean, particularly Chile, where it is an extremely rare surname. Much more frequently, Duillio is the forename as well as the last name.
Lica, Gavazzi, Gagetti, Nastasi, Freitas, Angiolucci, Cariello, Conzatti, Custodio, Pasquali, Nogueira, Oliveira, Cassaroli, Rodrigues, Damasceno, Goncalves, Rizzato, Peterle, Perrone, Bondade, Silva, Souza, Aledi, Assis, Carmo, Frank, Zaffi, Tassistro, Morais, Araujo, Brasil, Gouvea, Torres, Farias, Menezes, Caixeta, Soares, and Francisco