First - this is who he was http://en.wikipedia.org/wiki/Nicholas_Gilman
Second - Great Question! I have been wondering the same thing for over a year! I asked and it turns out they generated randomly but often with a theme. Example, we have a few Old school gangsters like Dillinger and Capone etc. that all got named that way when a new rack of servers went online.
I wish there was more rhyme and reason to it, but that's it.
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