Family name Ameztoy (Ameztoy 
) , in the world, is a rare cognomen. The family name Ameztoy is habitual in Uruguay, where it is a rare surname, Argentina, and Belgium, where it is a very rare surname. In absolute terms, it is the most numerous in Argentina, France, and Spain. Very seldom, Ameztoy is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Ameztoy | Uruguay, Belgium, Spain, Argentina, France |
| begoña ameztoy Spanish artist and writer, ES (b. 1951) |
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| kinia ameztoy researcher |
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| alazne ameztoy audio technician, ES |
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| virginia ameztoy Argentinian actor, AR |
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Ana, Lucas, Juana, Irene, Martin, Manuel, Monica, Miriam, Silvia, Susana, Sophie, Albert, Alvaro, Andrea, Andres, Anibal, Adrien, Carlos, Debora, Gladys, Gloria, Johann, Lucia, Limay, Laura, Perla, Ane, Hã, Sara, Aixa, Remy, Luis, Jose, Juan, Elsa, Elba, Victor, Iban, Maria, Mario, Malen, Miria, Mirta, Ander, Clara, Belen, Kinia, Paola, Ibai, and Fabian