The quantity of people with the surname Garaghan that we can find in each country can help us discern the origin of the surname Garaghan, as logic tells us that the place with the most people surnamed Garaghan will be the country or area of origin of the surname Garaghan.
Globalization can make the surname Garaghan be found in almost every country around the globe, but being able to see the density of people residing in a country with the surname Garaghan greatly aids all those who seek a deeper knowledge about the surname Garaghan.