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