@peterdrake PArt of the reason for that is that while being the most popular it doesnt have a very big piece of the pie. I dont remember the exact percentage but were talking single digits or less. Other countries, even ones with smaller populations, have a larger disparity where the most popular name will be a much larger chunk int erms of %.

Ive read up on some hard research on this topic. It basically boils down to older societies and languages tend to have greater disparity. So a young language/country like the USA wont have very many Smiths overall, but older languages and countries like chinese will have a rather large portion of their population all with the same name.

Long story short over time the number of surnames tends towards 1.