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Surname Jaen (Jaen , Jaén ) , around the world, is a common family name. The family name Jaen is habitual in Latin America and the Caribbean, particularly Panama, where it is a common surname, Costa Rica, where it is quite a common surname, and Guadeloupe (explore the name in all countries). Measured by absolute frequency, it most frequently occurs in Panama, Spain, and Mexico. Very seldom, Jaen is the forename as well as the last name.