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