In this world map, you can check at a single glance which countries have more people with the surname Mercer. As you can see, it's effortless to notice which countries have a higher number of people carrying the Mercer surname.
Using graphic elements like this world map, to see in which countries or regions of the world the surname Mercer is more common, is of great help.
The quantity of people with the surname Mercer that we can find in each country can help us discern the origin of the surname Mercer, as logic tells us that the place with the most people surnamed Mercer will be the country or area of origin of the surname Mercer.