The quantity of people with the surname Gillem that we can find in each country can help us discern the origin of the surname Gillem, as logic tells us that the place with the most people surnamed Gillem will be the country or area of origin of the surname Gillem.
Locating at a single glance the countries where the surname Gillem is more abundant, as well as the areas of the globe where there are hardly any people with the surname Gillem, is of great utility for individuals interested in surnames, and specifically in the surname Gillem, as it allows them to quickly and easily visualize the data and its distribution."