Family name Simon-Gaston (Simon-Gaston 
) , around the world, is an extremely rare surname. The family name Simon-Gaston is habitual in Northern America, particularly the United States, where it is an extremely rare surname. Parts of the name also exists independently as a first name Simon, and a first name Gaston.
| VARIANT | COUNTRY |
|---|---|
| Simon-Gaston | United States |