Last name Eifer (Eifer 
, Эйфер 
) , all over the world, is a rare cognomen. The family name Eifer is habitual in Denmark, where it is a rare surname, Germany, and Venezuela, where it is a very rare surname. Measured by absolute frequency, the name is most common in Germany, Russia, and Colombia. Also, Eifer is the forename as well as the last name.