Surname Casteleiro (Casteleiro 
) , around the globe, is a rare family name. The surname Casteleiro is characteristic of Portugal, where it is quite a rare surname, Spain, where it is a rare surname, and Switzerland. Not in comparison with a country's population, the name is most common in Portugal, Spain, and the United States. Very seldom, Casteleiro is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Casteleiro | Portugal, Spain, United States, France, Brazil |
| cipriano casteleiro feal ES (b. 1913) |
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| joão malaca casteleiro Portuguese linguist, PT (b. 1936) |
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| esperanza casteleiro llamazares spanish intelligence agent, ES (b. 1956) |
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| pedro casteleiro Spanish poet, ES (b. 1968) |
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| mercedes arguello casteleiro researcher |
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| mercedes arguello casteleiro |
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Mr, Tony, Tere, Nora, Nuno, Ines, Iria, Ivan, Olga, Maria, Mario, Marta, Marã, Mayra, Myrna, Santi, Sofia, Angel, Cathy, Celia, Bruno, Paula, Juan, Joã, Joel, Joao, Ms, Ana, Rui, Joo, Eva, Sara, Alex, Alba, Cari, Cary, Pablo, Karl, Rosa, Davi, Geno, Lara, Loli, Luis, Luiz, Luã, Jose, John, Paul, and Pedro