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