Last name Rostar (Rostar 
) , in the world, is a rare surname. The family name Rostar is habitual in Eastern Europe, particularly Slovakia, where it is quite a rare surname, Czechia, where it is a rare surname, and Hungary. Not in comparison with a country's population, it is commonest in Slovakia, the United States, and Indonesia. Also, Rostar is the forename as well as the last name.