The quantity of people with the surname Petkau that we can find in each country can help us discern the origin of the surname Petkau, as logic tells us that the place with the most people surnamed Petkau will be the country or area of origin of the surname Petkau.
Globalization can make the surname Petkau be found in almost every country around the globe, but being able to see the density of people residing in a country with the surname Petkau greatly aids all those who seek a deeper knowledge about the surname Petkau.