There is a persistent story in a lot of American families that their last name was changed at Ellis Island, garbled by an agent who simply wrote it down incorrectly. Now, it's possible that the name really was changed at some point, but it didn't happen at Ellis Island. Here's why.
Via National Geographic comes this at-a-glance visualization of surnames across America.
As you walk through the streets of your city, you might orient yourself by intersection, neighborhood, or the presence of your favorite coffee shop. This interactive map of London, however, lets you view the city a different way: by concentrations of Johnsons, Bennetts, and Patels.