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