Cognomen Ферм (Ferm 
, Thermus , Ферм 
) , in the world, is quite a rare last name. The surname Ферм is characteristic of Sweden, where it is quite a common surname, Finland, where it is quite a rare surname, and Malta. In absolute terms, it most frequently occurs in Sweden, the United States, and Finland. Very seldom, Ферм is the forename as well as the last name.