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