Last name Медер (Медер 
, Meder 
, Maeder 
) , worldwide, is a common cognomen. The family name Медер is habitual in Switzerland, where it is quite a common surname, Kyrgyzstan, and Germany. Measured by absolute frequency, it is commonest in Germany, the United States, and Switzerland. Much less frequently, Медер is the forename as well as the last name.