Surname Efren (Efren 
, Efrén 
, Fren ) , around the globe, is a common cognomen. The family name Efren 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 is the most numerous in Mexico, Spain, and Venezuela. More frequently, Efren is the forename as well as the last name.