Surname Rosther (Rosther 
) , around the globe, is an extremely rare last name. The family name Rosther is habitual in Colombia, where it is a very rare surname, Chile, where it is an extremely rare surname, and the United States. Much more frequently, Rosther is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rosther | India, Tanzania, Democratic Republic of the Congo, Colombia, Brazil |