Across the world, Rossier (Rossier 
) is a very rare unisex forename. The forename Rossier is characteristic of Switzerland, where it is a rare gender-neutral name, and China, where it is an extremely rare male name. More frequently, Rossier is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Rossier | Argentina, France, United States, South Africa, Switzerland |