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