Cognomen Vadillo (Vadillo 
) , in the world, is quite a common surname. The cognomen Vadillo is habitual in Spain, where it is quite a rare surname, Bolivia, and Mexico. In absolute terms, it is the most numerous in Mexico, Spain, and Peru. Also, Vadillo is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Vadillo | Mexico, Spain, Peru, Philippines, Argentina |
| juan de vadillo ES (b. 1495) |
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| rodrigo de vadillo ES (b. 1506) |
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| josé manuel de vadillo ES (b. 1777) |
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evelio vadillo Mexican lawyer (1904-1958), MX (b. 1904) |
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| víctor villanueva vadillo Spanish politician, ES (b. 1906) |
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josé arnáez vadillo ES (b. 1957) |
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| enrique ruiz vadillo ES (b. 1926) |
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bárbara de aymerich vadillo ES (b. 1976) |
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álvaro vadillo cifuentes Spanish footballer, ES (b. 1994) |
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| maria vadillo French politician, FR (b. 1949) |
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| vicente vadillo ES (b. 1940) |
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| enrique gómez vadillo (b. 1943) |
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| pedro josé gomez vadillo Spanish association football player, ES (b. 1962) |
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| jose angel vadillo Computer scientist and researcher, ES (b. 1962) |
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| umar vadillo Spanish scholar, ES (b. 1964) |
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