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Family name Fren (Efren , Fren , Frein ) , around the globe, is a common surname. The cognomen Fren is habitual in Latin America and the Caribbean, particularly Mexico, where it is quite a common surname, Nicaragua, and Venezuela, where it is quite a rare surname. Measured by absolute frequency, it most frequently occurs in Mexico, Spain, and Venezuela. More frequently, Fren is the forename as well as the last name.