In this world map, you can check at a single glance which countries have more people with the surname Hartigan. As you can see, it's effortless to notice which countries have a higher number of people carrying the Hartigan surname.
Using graphic elements like this world map, to see in which countries or regions of the world the surname Hartigan is more common, is of great help.
The quantity of people with the surname Hartigan that we can find in each country can help us discern the origin of the surname Hartigan, as logic tells us that the place with the most people surnamed Hartigan will be the country or area of origin of the surname Hartigan.