Cognomen Lejer (Lejer 
, Лежер 
, Лейер 
) , in the world, is a rare surname. The surname Lejer is habitual in Kazakhstan, where it is a rare surname, the Dominican Republic, and Belarus. In absolute terms, it is the most numerous in Kazakhstan, the Dominican Republic, and Russia. Much less frequently, Lejer is the forename as well as the last name.