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