The most common surnames in the United States are Smith, Johnson, Williams, Brown, and Jones. For Europe, let's look at this map created by Reddit user Teepr. Does anything surprise you, or look like it needs updating? Everything I can find on Portugal has "Silva" as top name, but it's possible I'm not looking at the most recent data.

The Afternoon Map is a new semi-regular feature in which we post maps and infographics. In the afternoon. Semi-regularly. Thanks to TwistedSifter for sharing this one.