Thanks to this world map that shows the density of people with the surname Oei in different countries, you can get an idea not only of the popularity of the surname Oei in each country but also of the different migrations of people surnamed Oei.
The quantity of people with the surname Oei that we can find in each country can help us discern the origin of the surname Oei, as logic tells us that the place with the most people surnamed Oei will be the country or area of origin of the surname Oei.
Globalization can make the surname Oei 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 Oei greatly aids all those who seek a deeper knowledge about the surname Oei.