Cognomen Gastien (Gastien 
) , throughout the world, is a very rare last name. The last name Gastien is characteristic of Argentina, where it is a very rare surname, France, and Brazil, where it is an extremely rare surname. More frequently, Gastien is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Gastien | Canada, Argentina, Democratic Republic of the Congo, Cameroon, France |
|
pascal gastien French association football player and manager, FR (b. 1963) |
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johan gastien French footballer, FR (b. 1988) |
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