Last name Файдер (Faider 
, Feider 
, Файдер 
) , in all the world, is quite a rare cognomen. The surname Файдер is characteristic of Western Europe, particularly Luxembourg, where it is quite a common surname, Belgium, where it is a rare surname, and Germany. Measured by absolute frequency, it is commonest in the United States, Germany, and Luxembourg. Very seldom, Файдер is the forename as well as the last name.