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