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