Around the world, Délio (Délio 
) is a rare boy's first name. The first name Délio is characteristic of Angola, where it is a rare masculine name, and Portugal.
| VARIANT | COUNTRY |
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| Délio | Mozambique, Brazil, Portugal, Angola, France |
| délio pereira de souza BR (b. 1918) |
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| délio braz Brazilian politician, BR (b. 1940) |
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| délio cesar leal Brazilian politician, BR (b. 1947) |
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| délio de jesus malheiros Brazilian lawyer, BR (b. 1961) |
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| délio de mendonça (b. 1958) |
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| délio de moura xavier de moraes júnior Brazilian priest, BR (b. 1974) |
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| délio bazílio leal Brazilian politician, BR |
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| délio baêta researcher (ORCID 0000-0002-1427-1878) |
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| délio dos santos Brazilian politician, BR |
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| délio baêta |
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Melo, Junior, Viegas, Martins, Marques, Santana, Almeida, Andrade, Augusto, Barbosa, Batista, Ribeiro, Júnior, Fonseca, Monteiro, Mesquita, Carvalho, Carquejo, Pinheiro, Ferreira, Oliveira, Rodrigues, Duarte, Baêta, Campos, Castro, Rosa, Dias, Lima, Matos, Silva, Souza, Alves, Costa, Paiva, Rocha, Fernandes, Gomes, Jesus, Neves, Nunes, Horta, Filho, Manuel, Morais, Mendes, Santos, Soares, Lopes, and Gonçalves