Cognomen Диттмер (Dittmer 
, Диттмер) , all over the world, is quite a common last name. The surname Диттмер is habitual in Germany, where it is quite a rare surname, Denmark, and New Zealand. Measured by absolute frequency, it is the most numerous in Germany, the United States, and Sweden. Much less frequently, Диттмер is the forename as well as the last name.