In this world map, you can check at a single glance which countries have more people with the surname Sirai. As you can see, it's effortless to notice which countries have a higher number of people carrying the Sirai surname.
The quantity of people with the surname Sirai that we can find in each country can help us discern the origin of the surname Sirai, as logic tells us that the place with the most people surnamed Sirai will be the country or area of origin of the surname Sirai.