President Bush and Geoffrey Chaucer.

Ancestry.com has a feature called "find a famous relative." I did that, and discovered that President George Bush is my 8th cousin. My 8x great grandmother was Grace Heaton, which is through the Stull-Sullivan-Ing line, and that was his 8x great grandmother, too. That same line also goes back, much further, to Sir Isaac Newton, but also includes Rutherford B. Hayes and a few other folks. A different branch, Stull-Sullivan-Smothers, shows that Geoffrey Chaucer was my 17x great grandfather.