This looks like fun. The fictional Middle-earth is now the subject of a minutely-detailed "family tree project."
Emil Johansson, a photographer and chemical engineering student from Sweden, who has read "every book there is to read about Middle-earth" has spent years compiling a family tree of every character in Tolkien's world. Supreme god Eru Ilúvatar sits at the top, but dig a little further and you'll find out how the Sackville-Bagginses are linked to the Bagginses, that Sam Gamgee and Rosie Cotton had 12 little hobbit children, and much more.
You can read more in an article by Alison Flood in the Guardian at http://goo.gl/k0PNl.
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