Globally, Alcy (Alcy 
) is quite a rare predominantly female, but very seldom male first name. The first name Alcy is characteristic of Brazil, where it is quite a rare girly name, the Democratic Republic of the Congo, where it is a rare unisex name, and Panama, where it is a rare masculine name. Not in comparison with a country's population, it is commonest in Brazil, the Democratic Republic of the Congo, and Colombia. Very seldom, Alcy is the last name as well as the forename.
| VARIANT | COUNTRY |
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| Alcy | Haiti, Venezuela, Brazil, United States, Democratic Republic of the Congo |
| alcy simões Brazilian association football player (1913-2001), BR (b. 1913) |
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| alcy gigliotti Brazilian writer and poet (1930-2007), BR (b. 1930) |
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| alcy cheuiche Brazilian writer and poet, BR (b. 1940) |
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| alcy linares person identified in the Museu da Pessoa collection, BR (b. 1943) |
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| alcy xavier BR (b. 1933) |
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Cruz, Junior, Torres, Vieira, Martins, Machado, Moreira, Santana, Almeida, Azevedo, Cardoso, Barbosa, Pereira, Ribeiro, Monteiro, Silveira, Carvalho, Pinheiro, Nogueira, Ferreira, Oliveira, Rodrigues, Garcia, Coelho, Correa, Campos, Rosa, Reis, Dias, Lima, Neto, Moura, Silva, Sousa, Souza, Alves, Fernandes, Costa, Ramos, Rocha, Gomes, Lopes, Nunes, Filho, Moraes, Santos, Soares, Araujo, Pinto, and Nascimento