Last name Rosster (Rosster 
) , around the world, is a very rare cognomen. The surname Rosster is habitual in Brazil, where it is an extremely rare surname, Venezuela, and Canada. Not in comparison with a country's population, it is commonest in Brazil, the United States, and Venezuela. Very seldom, Rosster is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rosster | Brazil, Canada, Philippines, United States, Venezuela |