Last name Arnaldo (Arnaldo 
, Арнальдо 
, ארנאלדו 
) , throughout the world, is a common cognomen. The cognomen Arnaldo is habitual in Latin America and the Caribbean, particularly Honduras, where it is quite a common surname, Venezuela, and Argentina, where it is quite a rare surname. Measured by absolute frequency, this name is the most popular in Venezuela, Philippines, and Argentina. More prevalently, Arnaldo is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Arnaldo | Paraguay, Philippines, Brazil, Italy, Argentina |
| Арнальдо | Ukraine |
| ארנאלדו | Israel |
| pietro antonio arnaldo Italian priest and theologian (1638-end of 17th century), FR (b. 1638) |
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manuel fuster i arnaldo Spanish jurist, lawyer and politician (1808-1864), ES (b. 1808) |
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| enrique arnaldo alcubilla ES (b. 1957) |
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| javier arnaldo ES (b. 1959) |
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| tony arnaldo actor, PH |
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| benny bernard arnaldo Indonesian political candidate, ID |
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| tin arnaldo actor, PH |
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| paulo arnaldo researcher (ORCID 0000-0001-8747-5209) |
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| paula seixas arnaldo researcher ORCID ID = 0000-0003-0063-089X |
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| carlos arnaldo researcher ORCID ID = 0000-0002-8323-5360 |
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Melo, Vieira, Martins, Machado, Moreira, Santana, Almeida, Andrade, Cardoso, Barbosa, Pereira, Ribeiro, Freitas, Martinez, Carvalho, Gonzalez, Teixeira, Ferreira, Oliveira, Rodriguez, Rodrigues, Goncalves, Junior, Garcia, Castro, Araujo, Cruz, Reis, Dias, Lima, Neto, Silva, Sousa, Souza, Alves, Costa, Fernandes, Brito, Pinto, Ramos, Rocha, Gomes, Lopez, Lopes, Jesus, Filho, Santos, Soares, Perez, and Nascimento