The quantity of people with the surname Trolio that we can find in each country can help us discern the origin of the surname Trolio, as logic tells us that the place with the most people surnamed Trolio will be the country or area of origin of the surname Trolio.
Globalization can make the surname Trolio be found in almost every country around the globe, but being able to see the density of people residing in a country with the surname Trolio greatly aids all those who seek a deeper knowledge about the surname Trolio.