Cognomen Gaston Fabian (Gaston Fabian 
) , in the world, is an extremely rare family name. The last name Gaston Fabian is characteristic of Latin America and the Caribbean, particularly Chile, where it is a very rare surname. More frequently, Gaston Fabian is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Gaston Fabian | Ecuador, Chile, Argentina |