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