Last name Vallecillo (Vallecillo 
) , all over the world, is a common surname. The surname Vallecillo is characteristic of Latin America and the Caribbean, particularly Honduras, where it is a common surname, Nicaragua, and Costa Rica, where it is quite a rare surname. In absolute terms, it is the most numerous in Latin America and the Caribbean, particularly Honduras, Nicaragua, and Mexico. Much less frequently, Vallecillo is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Vallecillo | Nicaragua, Spain, Mexico, Honduras, United States |
| antonio vallecillo (b. 1807) |
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| antonio vallecillo researcher ORCID ID = 0000-0002-8139-9986 (b. 1962) |
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| mariela vallecillo Argentine alpine skier, AR (b. 1970) |
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| ángel vallecillo ES (b. 1968) |
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| francisco vallecillo Spanish taekwondo practitioner, ES |
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| érick vallecillo Honduran footballer, HN (b. 1980) |
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| antonio j vallecillo researcher |
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| cristina vallecillo researcher |
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| esther subias vallecillo ES (b. 1971) |
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| orlin vallecillo Honduran footballer, HN (b. 1983) |
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| eduardo vallecillo Spanish association football player, ES (b. 1991) |
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