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