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