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