Worldwide, Efrain Gerardo (Efrain Gerardo 
) is a rare masculine first name. The given name Efrain Gerardo is habitual in Latin America and the Caribbean, particularly Costa Rica, where it is quite a rare masculine name, Peru, where it is a very rare masculine name, and Chile. Very seldom, Efrain Gerardo is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Efrain Gerardo | Peru, Chile, Belgium, Ecuador, Costa Rica |