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