Presidential Genealogies

We've all heard family tales of a distant relative being the second cousin, twice removed of President "So-and-So." But is it really true? In reality, it's not all that unlikely. Hundreds of thousands of people, if they go back far enough, can find evidence linking them to a U.S. president. As a bonus, the documented lineages of most U.S. presidents provide links to major royal houses of Europe.