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