Last name Rosarian (Rosarius 
, Rosarian 
) , across the world, is a rare surname. The last name Rosarian is characteristic of Germany, where it is a rare surname, Hungary, where it is a very rare surname, and Indonesia. Not in comparison with a country's population, it is the most numerous in Germany, Indonesia, and the United States. Much less frequently, Rosarian is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rosarius | Germany, Indonesia, India, United States, Hungary |
| Rosarian | Philippines, United States, China |