Thanks to this world map that shows the density of people with the surname Oeller in different countries, you can get an idea not only of the popularity of the surname Oeller in each country but also of the different migrations of people surnamed Oeller.
Locating at a single glance the countries where the surname Oeller is more abundant, as well as the areas of the globe where there are hardly any people with the surname Oeller, is of great utility for individuals interested in surnames, and specifically in the surname Oeller, as it allows them to quickly and easily visualize the data and its distribution."