Cognomen Ismael Efren (Ismael Efren 
) , all over the world, is an extremely rare last name. The family name Ismael Efren is habitual in Latin America and the Caribbean, particularly Chile, where it is an extremely rare surname. More frequently, Ismael Efren is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ismael Efren | Chile, Ecuador, Mexico |