Locating at a single glance the countries where the surname Trefethen is more abundant, as well as the areas of the globe where there are hardly any people with the surname Trefethen, is of great utility for individuals interested in surnames, and specifically in the surname Trefethen, as it allows them to quickly and easily visualize the data and its distribution."
Globalization can make the surname Trefethen 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 Trefethen greatly aids all those who seek a deeper knowledge about the surname Trefethen.