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