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