Family name Gaston Hernan (Gaston Hernan 
) , in the world, is a very rare surname. The surname Gaston Hernan is habitual in Latin America and the Caribbean, particularly Chile, where it is a rare surname. More frequently, Gaston Hernan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Gaston Hernan | Ecuador, Spain, Argentina, Chile, Peru |