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