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