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