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