Cognomen Cosío (コシオ 
, Cosío 
) , across the world, is a rare family name. The last name Cosío is habitual in Mexico, where it is a very rare surname, Spain, and Costa Rica. In absolute terms, this name is the most popular in Mexico, Spain, and Peru. More frequently, Cosío is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| コシオ | Japan |
| Cosío | Costa Rica, Spain, Mexico, United States, Peru |
| diego de cosío ES (b. 1591) |
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| antonio valverde y cosío Spanish colonial governor, ES (b. 1670) |
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| manuel alejandro de acevedo y cosío (b. 1763) |
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manuel gonzález cosío Mexican military personnel, MX (b. 1836) |
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| maría de jesús zepeda y cosío (b. 1821) |
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| félix cosío medina Peruvian lawyer, PE (b. 1890) |
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| josé lorenzo cossío y cosío Mexican judge, MX (b. 1902) |
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joaquín cosío Mexican actor, MX (b. 1962) |
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| rebeca silva cosío Mexican singer, MX (b. 1925) |
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| arturo gonzález cosío MX (b. 1930) |
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| guillermo cosío Mexican association football player, MX (b. 1958) |
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| guillermo flores cosío researcher (ORCID 0000-0002-3745-2057) |
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| teresita gonzález de cosío researcher |
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| moisés cosío |
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Ana, David, Diana, Diego, Laura, Jaime, José, Jorge, Julio, Tania, Toño, Nancy, Nidia, Norma, Edgar, Erika, Vicky, Martha, María, Manuel, Miguel, Sandra, Paula, Karla, Karen, Carlo, Ary, Luz, Ing, Mami, Alex, Alma, Axel, Raul, Rosa, Rene, Silvia, Luis, Juan, Nani, Erik, Iris, Omar, Yeny, Maria, Mario, Marco, Mauro, Jose, and Sergio