Cognomen 罗斯特 (Rost 
, 罗斯特 
) , in the entire world, is a common last name. The cognomen 罗斯特 is habitual in Germany, where it is quite a common surname, Denmark, where it is quite a rare surname, and Argentina. In absolute terms, it most frequently occurs in Germany, the United States, and Brazil. Much less frequently, 罗斯特 is the forename as well as the last name.