Cognomen Buño (Buño 
) , globally, is a rare family name. The last name Buño is habitual in Uruguay, where it is a rare surname, Spain, where it is a very rare surname, and Argentina. Not in comparison with a country's population, the name is most common in Spain, Philippines, and Argentina. Much less frequently, Buño is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Buño | Spain, Uruguay, Philippines, United States, Argentina |
| washington buño Uruguayan writer, UY (b. 1908) |
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| indalecio buño Uruguayan writer, UY (b. 1917) |
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| bonifacio oliquino buño researcher (ORCID 0000-0002-8483-7013) |
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| rosa buceta de buño Uruguayan writer, UY |
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Ma, Eladio, Enelyn, Victor, Isabel, Warren, Madonna, Algeron, Analine, Americo, Ahlyzah, Charles, Carmela, Claudio, Roselyn, Rogelio, Rhealyn, Joaquin, Joahnna, Jomarie, Justine, Nemesio, Danilo, Betina, Carmen, Adolfo, Rosa, Gema, Luis, Jose, Maria, Arlyn, Arvin, Kevin, Romeo, Ronel, Osvaldo, Laura, Jocel, Elena, Erica, Irish, Morris, Myrish, Sakura, Silvia, Alyssa, Adrian, José, and Menandro