Family name Irenio (Irenio 
) , across the world, is a rare surname. The cognomen Irenio is habitual in Latin America and the Caribbean, particularly Mexico, where it is a rare surname, Chile, and Nicaragua. In absolute terms, it is commonest in Mexico, Philippines, and Brazil. More prevalently, Irenio is the forename as well as the last name.
Mota, Junior, Torres, Vieira, Martins, Moreira, Santana, Almeida, Andrade, Cardoso, Barreto, Barbosa, Pereira, Ribeiro, Carvalho, Teixeira, Ferreira, Oliveira, Conceicao, Cerqueira, Rodrigues, Dela Cruz, Garcia, Campos, Castro, Araujo, Cruz, Reis, Dias, Lima, Neto, Silva, Sousa, Souza, Alves, Anjos, Fernandes, Costa, Bispo, Pinto, Ramos, Rocha, Gomes, Lopes, Jesus, Filho, Santos, Soares, Brito, and Nascimento