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Cognomen Quiros (Quiros
, كيروس
, Quirós
) , in the entire world, is a common surname. The cognomen Quiros is characteristic of Costa Rica, where it is a widespread surname, Panama, where it is quite a common surname, and Spain. Measured by absolute frequency, the name is most common in Costa Rica, Spain, and Philippines. Very seldom, Quiros is the forename as well as the last name.