The quantity of people with the surname Ernaiz that we can find in each country can help us discern the origin of the surname Ernaiz, as logic tells us that the place with the most people surnamed Ernaiz will be the country or area of origin of the surname Ernaiz.
Globalization can make the surname Ernaiz 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 Ernaiz greatly aids all those who seek a deeper knowledge about the surname Ernaiz.