Thanks to this world map that shows the density of people with the surname Oter in different countries, you can get an idea not only of the popularity of the surname Oter in each country but also of the different migrations of people surnamed Oter.
The quantity of people with the surname Oter that we can find in each country can help us discern the origin of the surname Oter, as logic tells us that the place with the most people surnamed Oter will be the country or area of origin of the surname Oter.