Surname Cavalheiro (Caballero 
, Cavalheiro 
) , across the world, is a widespread last name. The family name Cavalheiro is habitual in Latin America and the Caribbean, particularly Paraguay, where it is a widespread surname, Panama, where it is a common surname, and Honduras (explore the name in all countries). Not in comparison with a country's population, the name is most common in Mexico, Philippines, and Colombia. Much less frequently, Cavalheiro is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Caballero | Brazil, Mexico, Paraguay, Philippines, Colombia |
| Cavalheiro | Brazil, Spain, Paraguay, Argentina, Colombia |
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humberto cavalheiro Uruguayan football manager, UY (b. 1960) |
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| edgard cavalheiro Brazilian writer, BR (b. 1911) |
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| antónio rodrigues cavalheiro PT (b. 1902) |
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| carlos alberto martins cavalheiro Olympic footballer (1932-2012), BR (b. 1932) |
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| paulo cavalheiro Brazilian boxer (1934-1989) (b. 1934) |
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olavo setembro cavalheiro Brazilian actor, BR (b. 1991) |
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| leonardo cavalheiro person identified in the Museu da Pessoa collection, BR (b. 1955) |
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| suzana cavalheiro Brazilian association football player, BR (b. 1966) |
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| pedro farmhouse cavalheiro PT (b. 1961) |
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| edinei cavalheiro person identified in the Museu da Pessoa collection, BR (b. 1971) |
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| jeferson de souza cavalheiro politician from Brazil, BR (b. 1972) |
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| adail de castro cavalheiro researcher at the University of Brasilia |
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| alberto josé cavalheiro researcher |
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| sergio cavalheiro researcher (ORCID 0000-0002-9750-0508) |
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| cristina schmitt cavalheiro researcher |
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