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Surname Troncoso (Troncoso , Тронкосо , トロンコソ) , around the globe, is a common family name. The family name Troncoso is characteristic of Latin America and the Caribbean, particularly Chile, where it is a common surname, Argentina, where it is quite a common surname, and the Dominican Republic. In absolute terms, the name is most common in Latin America and the Caribbean, particularly Chile, Argentina, and Mexico. Much less frequently, Troncoso is the forename as well as the last name.