Worldwide, Euclydes (Euclydes 
) is quite a rare boy's first name. The first name Euclydes is characteristic of Latin America and the Caribbean, particularly Brazil, where it is quite a rare masculine name. Much less frequently, Euclydes is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Euclydes | Portugal, Spain, Brazil, United States, Mexico |
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euclydes de oliveira figueiredo filho Brazilian military personnel (1919-2009), BR (b. 1919) |
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| euclydes camargo madeira Brazilian writer, politician, pharmacist and university professor, BR (b. 1907) |
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| euclydes hatem Brazilian martial artist, BR (b. 1914) |
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| euclydes pontes BR (b. 1908) |
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| euclydes marinho Brazilian writer and screenwriter, BR (b. 1950) |
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| euclydes marcos pettersen neto politician from Brazil, BR (b. 1984) |
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Rosa, Garcia, Junior, Vieira, Martins, Marques, Machado, Moreira, Almeida, Azevedo, Cardoso, Barbosa, Pereira, Ribeiro, Freitas, Monteiro, Carvalho, Teixeira, Ferreira, Oliveira, Rodrigues, Goncalves, Coelho, Campos, Castro, Araujo, Reis, Dias, Lima, Neto, Mello, Silva, Souza, Alves, Abreu, Costa, Fernandes, Cunha, Pinto, Ramos, Rocha, Gomes, Lopes, Netto, Filho, Moraes, Santos, Soares, Bueno, and Nascimento