Last name Эйфлер (Eifler 
, Эйфлер 
) , in all the world, is quite a rare cognomen. The family name Эйфлер is habitual in Germany, where it is quite a rare surname, Denmark, where it is a rare surname, and Czechia. In absolute terms, it most frequently occurs in Germany, Brazil, and the United States. Much less frequently, Эйфлер is the forename as well as the last name.