Family name Расмус (Rasmus 
, Расмус 
) , in the world, is quite a rare last name. The surname Расмус is characteristic of Northern Europe, particularly Finland, where it is quite a rare surname, Norway, and Denmark. Measured by absolute frequency, it is commonest in the United States, Finland, and Germany. More prevalently, Расмус is the forename as well as the last name.