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