Around the world, Adelio (Adelio 
, Adélio 
, Аделио 
) is a common boy's first name. The first name Adelio is characteristic of Italy, where it is quite a common masculine name, Bolivia, where it is quite a rare masculine name, and Brazil. Not in comparison with a country's population, it most frequently occurs in Brazil, Italy, and Philippines. Very seldom, Adelio is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Adelio | Italy, Indonesia, Philippines, Brazil, Mozambique |
| Adélio | Portugal, Angola, United States, Brazil, Mozambique |
| Аделио | Russia |
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adelio albarello Italian politician, IT (b. 1918) |
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adelio márquez Argentine athletics competitor (1924-2010), AR (b. 1924) |
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adelio tomasin Italian priest, IT (b. 1930) |
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adelio terraroli Italian politician (1931-2021), IT (b. 1931) |
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| adelio colzi IT (b. 1888) |
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adelio dell'oro Italian priest, IT (b. 1948) |
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| adelio zeoli AR (b. 1898) |
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| adelio ballerini French architect (1908-1973), FR (b. 1908) |
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| adelio fiore Italian association football player, IT (b. 1920) |
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| adelio pagliarani sentenced to death during the World War II, IT (b. 1925) |
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| adelio bianchini (b. 1922) |
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| adelio crespi Italian association football player (1937-2018), IT (b. 1937) |
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| adelio verga Italian association football player, IT (b. 1938) |
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| adelio colombo Italian association football player, IT (b. 1939) |
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| adelio salsano Italian electronic engineer (1941-), IT (b. 1941) |
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Melo, Vieira, Flores, Martins, Marques, Machado, Moreira, Santana, Almeida, Andrade, Cardoso, Barbosa, Batista, Pereira, Ribeiro, Freitas, Carvalho, Teixeira, Ferreira, Oliveira, Rodrigues, Goncalves, Junior, Borges, Campos, Castro, Cruz, Rosa, Reis, Dias, Lima, Neto, Silva, Sousa, Souza, Alves, Fernandes, Costa, Pinto, Ramos, Rocha, Gomes, Lopes, Jesus, Filho, Santos, Soares, Araujo, Brito, and Nascimento