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Last name Luján (Lujan , Luján , Лухан ) , globally, is a widespread family name. The surname Luján is characteristic of Guam, where it is a common surname, Peru, where it is quite a common surname, and Argentina (explore the name in all countries). Measured by absolute frequency, it is the most numerous in Latin America and the Caribbean, particularly Argentina, Mexico, and Peru. Much less frequently, Luján is the forename as well as the last name.