Cognomen Ontoria (Ontoria 
) , in all the world, is a rare last name. The family name Ontoria is characteristic of Spain, where it is a rare surname, Argentina, and Philippines, where it is a very rare surname. Likewise, Ontoria is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Ontoria | Brazil, Argentina, Philippines, France, Spain |
| sebastián ontoria Spanish association football player (1920-2004), ES (b. 1920) |
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| jesús briones ontoria Spanish politician, ES |
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| yaiza ontoria researcher |
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| eduardo ontoria geneticist |
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| agustín molina ontoria researcher |
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