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Cognomen Cástor (Castor , Cástor , Кастор) , globally, is a common surname. The cognomen Cástor is habitual in Philippines, where it is quite a common surname, Haiti, where it is quite a rare surname, and Spain. Not in comparison with a country's population, it is commonest in Philippines, the United States, and Brazil. Very seldom, Cástor is the forename as well as the last name.
Chao, Hernández, Lorenzo-Cáceres, Rodríguez, Iribarren, Fernandez, González, Rodriguez, Martínez, Vázquez, Villoria, Basterra, Caamaño, Carbajal, Sánchez, Vicente, Vasquez, Hidalgo, Herrera, Eguiluz, Padilla, Aravena, Martín, Bayón, Cossío, Castro, Aranda, Díaz, Sousa, Salas, Fernández, and Herrera Haro