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