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