Family name Ildemar (Ildemar 
) , in the world, is a rare cognomen. The cognomen Ildemar is characteristic of Latin America and the Caribbean, particularly Venezuela, where it is a rare surname, Argentina, where it is a very rare surname, and Mexico, where it is an extremely rare surname. More frequently, Ildemar is the forename as well as the last name.
Sa, Soares, Araujo, Amorim, Barros, Borges, Garcia, Junior, Machado, Miranda, Santana, Almeida, Andrade, Barbosa, Pereira, Ribeiro, Freitas, Carvalho, Gonzalez, Ferreira, Oliveira, Rodrigues, Santos, Moraes, Filho, Viana, Cruz, Rosa, Reis, Dias, Leal, Lima, Neto, Moura, Silva, Sousa, Goncalves, Souza, Abreu, Costa, Cunha, Brito, Pinto, Rocha, Gomes, Lopes, Jesus, Nunes, Alves, and Nascimento