Cognomen Castañares (Castañares 
) , all around the world, is quite a rare last name. The last name Castañares is habitual in Latin America and the Caribbean, particularly Argentina, where it is quite a rare surname, Uruguay, and Bolivia, where it is a rare surname. Not in comparison with a country's population, it most frequently occurs in Argentina, Mexico, and Spain. Very seldom, Castañares is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Castañares | Uruguay, Spain, Mexico, Philippines, Argentina |
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joaquín beltrán castañares Mexican military personnel (1858-1946), MX (b. 1858) |
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| adolfo p. castañares MX (b. 1880) |
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| jacinto eusebio gómez castañares Uruguayan composer, UY (b. 1919) |
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| jon castañares Spanish politician and economist, ES (b. 1925) |
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| wenceslao castañares (b. 1948) |
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| eliana castañares researcher (ORCID 0000-0002-5924-4283) |
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Ma, Anne, Anjj, Abel, Adan, Aida, Ailu, Carl, Cami, Bego, Kate, Kane, Raul, Rosa, Rene, Rita, Ruth, Dana, Davy, Dora, Lara, Lina, Aldo, Alma, Alan, Alex, Ale, Ana, Art, Aye, Roy, Rey, Laa, Lia, Luz, Jon, Lucy, Eva, Ivo, Ian, Marc, Mary, Mark, Mara, Maty, Maxi, Sara, Saul, Fer, and Luis