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