Cognomen Ronaldo (Ronaldo 
, رونالدو 
, Роналдо 
, along with others...) , in the entire world, is a common family name. The cognomen Ronaldo is habitual in Nicaragua, where it is quite a common surname, Egypt, and Algeria (explore the name in all countries). Not in comparison with a country's population, the name is most common in Egypt, Indonesia, and Algeria. More prevalently, Ronaldo is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Ronaldo | Egypt, Philippines, Brazil, Guatemala, Indonesia |
| رونالدو | Saudi Arabia, Iraq, Egypt, Sudan, Iran |
| Роналдо | Bulgaria, Kazakhstan, Russia, Ukraine |
| Рональдо | Russia, Ukraine |
| רונאלדו | Israel |
| Роналду | Kazakhstan, Russia |
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cristiano ronaldo Portuguese footballer (born 1985), PT (b. 1985) |
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| pepijn ronaldo Belgian performing artist, BE |
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| nanosh ronaldo Belgian performing artist, BE |
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| pedro ronaldo Belgian performing artist, BE |
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| maria ronaldo |
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| johnny ronaldo |
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| david ronaldo |
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| danny ronaldo BE |
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| fábio ronaldo Portuguese association football player, PT |
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| julio ronaldo ID (b. 1998) |
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Melo, Junior, Vieira, Martins, Machado, Moreira, Santana, Almeida, Andrade, Cardoso, Barbosa, Batista, Pereira, Ribeiro, Freitas, Carvalho, Teixeira, Ferreira, Oliveira, Conceicao, Rodrigues, Goncalves, Garcia, Campos, Castro, Araujo, Cruz, Rosa, Reis, Dias, Lima, Silva, Sousa, Souza, Alves, Costa, Fernandes, Brito, Ramos, Rocha, Gomes, Lopes, Jesus, Nunes, Filho, Moraes, Santos, Soares, Pinto, and Nascimento