Several providers offer interactive name distribution maps on the Internet to show on map backgrounds in which regions certain surnames occur particularly frequently. The name distribution maps from the Verein für Computergenealogie, Geogen (Christoph Stoepel) and Kartezumnamen are particularly suitable. The Verein für Computergenealogie offers data from two sources. On the basis of the German casualty lists of the 1st World War, the distribution of family names in 1890 and a telephone directory CD in 1996 can be displayed. Geogmen (Christoph Stoepel) distinguishes between the presentation of absolute and relative numbers in his name distribution maps in order to offset the absolute numbers with the population density in the relative presentation. There is also a Geogen v4 version for three-dimensional representation. Translated with DeepL.com (free version)