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Family name Caldas (Caldas , Калдаш ) , around the globe, is a common cognomen. The last name Caldas is characteristic of Portugal, where it is quite a common surname, Brazil, and Peru (explore the name in all countries). In absolute terms, the name is most common in Latin America and the Caribbean, particularly Brazil, Peru, and Colombia. Much less frequently, Caldas is the forename as well as the last name.