Last name Росер (Roser 
, Росер 
) , worldwide, is a common surname. The last name Росер is characteristic of Spain, where it is quite a common surname, Slovenia, and Switzerland, where it is quite a rare surname. Not in comparison with a country's population, this name is the most popular in Spain, Germany, and the United States. Likewise, Росер is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Roser | Germany, Spain, Australia, United States, France |
| Росер | Kyrgyzstan, Armenia |