The quantity of people with the surname Karayiannis that we can find in each country can help us discern the origin of the surname Karayiannis, as logic tells us that the place with the most people surnamed Karayiannis will be the country or area of origin of the surname Karayiannis.
Locating at a single glance the countries where the surname Karayiannis is more abundant, as well as the areas of the globe where there are hardly any people with the surname Karayiannis, is of great utility for individuals interested in surnames, and specifically in the surname Karayiannis, as it allows them to quickly and easily visualize the data and its distribution."
Globalization can make the surname Karayiannis be found in almost every country around the globe, but being able to see the density of people residing in a country with the surname Karayiannis greatly aids all those who seek a deeper knowledge about the surname Karayiannis.