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Family name Cuellar (Cuellar , Cuéllar ) , globally, is a widespread cognomen. The surname Cuellar is characteristic of Latin America and the Caribbean, particularly Bolivia, where it is a common surname, El Salvador, and Colombia, where it is quite a common surname (explore the name in all countries). In absolute terms, it most frequently occurs in Latin America and the Caribbean, particularly Mexico, Colombia, and Bolivia. Very seldom, Cuellar is the forename as well as the last name.