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