Cognomen Удер (Uder 
, Удер 
) , around the globe, is a rare family name. The last name Удер is habitual in Estonia, where it is quite a rare surname, Germany, where it is a rare surname, and Costa Rica. Not in comparison with a country's population, it most frequently occurs in Germany, Indonesia, and the United States. Much less frequently, Удер is the forename as well as the last name.