Cognomen Rosert (Rosert 
) , in the entire world, is a very rare last name. The last name Rosert is characteristic of Germany, where it is a very rare surname, France, and Israel. Not in comparison with a country's population, this name is the most popular in Germany, France, and Nigeria. More prevalently, Rosert is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rosert | Democratic Republic of the Congo, South Africa, France, Germany, United States |