Using graphic elements like this world map, to see in which countries or regions of the world the surname Oneail is more common, is of great help.
The quantity of people with the surname Oneail that we can find in each country can help us discern the origin of the surname Oneail, as logic tells us that the place with the most people surnamed Oneail will be the country or area of origin of the surname Oneail.
Locating at a single glance the countries where the surname Oneail is more abundant, as well as the areas of the globe where there are hardly any people with the surname Oneail, is of great utility for individuals interested in surnames, and specifically in the surname Oneail, as it allows them to quickly and easily visualize the data and its distribution."