Family name Сейм (Seim 
, Сейм 
) , throughout the world, is quite a rare last name. The last name Сейм is habitual in Norway, where it is quite a common surname, Estonia, where it is quite a rare surname, and Germany. In absolute terms, it is the most numerous in the United States, Norway, and Germany. Very seldom, Сейм is the forename as well as the last name.