Cognomen Ilidia (Ilidia 
) , in all the world, is a very rare last name. The last name Ilidia is habitual in Spain, where it is a very rare surname, Venezuela, and Honduras. Not in comparison with a country's population, it is commonest in Spain, Brazil, and Venezuela. Much more frequently, Ilidia is the forename as well as the last name.
Melo, Vieira, Martins, Marques, Machado, Moreira, Miranda, Almeida, Andrade, Azevedo, Cardoso, Barbosa, Pereira, Ribeiro, Freitas, Carvalho, Teixeira, Ferreira, Oliveira, Conceicao, Rodrigues, Goncalves, Garcia, Campos, Araujo, Soares, Cruz, Rosa, Reis, Dias, Lima, Moura, Silva, Sousa, Souza, Alves, Fernandes, Costa, Paula, Pinto, Ramos, Rocha, Gomes, Lopes, Jesus, Morais, Mendes, Santos, Cunha, and Nascimento