Most common last names in Europe

I came across this article in The Independent; it shows a map of the popular common last names in Europe and what their meanings are:

http://indy100.independent.co.uk/article/the-map-that-explains-the-most-common-surnames-in-europe-and-what-they-mean--Zk89zoZUTIW

It made me smile that on both maps, the United Kingdom had "Smith" as its most popular last name! To my knowledge, Smith is still the most common last name in America, too.