Not seeing a ton of detail on how or when this survey was conducted, so don't make any wagers based on it. The second link has a bit of info about this project. And it has a clickable alphabet allowing you to find out, for instance, how many schools around the country are the Saxons.

http://highschoolnicknames.homestead.com/common.html

http://highschoolnicknames.homestead.com/

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