Identify personal links to history by comparing your ancestors to Geni projects.
HistoryLink will compare your direct ancestors (and their siblings) to projects on Geni that focus on historical or famous individuals. It will list any matches found, the relation, and what projects they belong to. It can also search for master profiles, problem profiles, and can create a simple visualization of tree completeness.
(click title to go there)
Note that not being connected to the world family tree will severely limit the potential for ancestor matches.
Source code for HistoryLink can be found at GitHub.