Family name Costoya (Costoya 
) , throughout the world, is quite a rare last name. The last name Costoya is habitual in Argentina, where it is quite a rare surname, Uruguay, where it is a rare surname, and Spain. Measured by absolute frequency, the name is most common in Argentina, Spain, and Philippines. Very seldom, Costoya is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Costoya | Philippines, Uruguay, Spain, Argentina, Venezuela |
| manuel novoa costoya ES (b. 1865) |
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| rebeca costoya Venezuelan actress, VE (b. 1966) |
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| carlos garcía costoya 1968- (b. 1968) |
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| josé a costoya researcher |
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| iris rodríguez costoya researcher (ORCID 0000-0002-6690-9423) |
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| cristina costoya Ph.D. Université de Lille I 2003 |
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| liliana costoya researcher |
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| alfonso costoya ES (b. 1975) |
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| alejandro costoya Spanish handball player, ES (b. 1993) |
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Mr, Nora, Elsa, Ernz, Hugo, Fran, Iris, Iria, Omar, Maria, Mario, Marta, Marã, Maite, Mabel, Santi, Shane, Sofia, Alice, Allan, Angel, Antia, Juan, Joel, Jose, Luis, Ms, Sol, Ana, Che, Cã, Bev, Roi, Lis, Eva, Fco, Annie, Ike, Mara, Sara, Alan, Alba, Aida, Raul, Rosa, Rosy, Rita, Luca, Ona, and Arnel