Last name Caillava (Caillava 
) , worldwide, is a rare family name. The family name Caillava is characteristic of Uruguay, where it is quite a rare surname, Argentina, where it is a rare surname, and France, where it is a very rare surname. Measured by absolute frequency, it most frequently occurs in Latin America and the Caribbean, particularly Argentina, Brazil, and Uruguay.
| VARIANT | COUNTRY |
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| Caillava | Brazil, France, Argentina, Uruguay |
| michel caillava French Catholic priest (b. 1849) |
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| domingo a. caillava Uruguayan writer, UY (b. 1890) |
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| raymond caillava French screenwriter (1907-1999), FR (b. 1907) |
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| miguel caillava Uruguayan association football player (1953-2014), UY (b. 1953) |
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| silvio g. montero caillava UY (b. 1953) |
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| ana j caillava researcher (ORCID 0000-0002-6001-4346) |
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Mr, Cesar, Beluu, Bruna, Paola, Rocio, Rubia, Ruben, Diana, Laura, Lucia, Lucii, Lucas, Luize, José, Jorge, Jesus, Norma, Noemi, Hilda, Irene, Oscar, Celia, Carol, Alice, Sofia, Ana, Eva, Fer, Sara, Alma, Adao, Rosa, Davi, Luis, Luiz, Marina, Jose, Jean, Juan, Neli, Elsa, Vera, Ines, Igor, Maria, Mario, Marta, Joao, and Martin