I'm a genealogy fanatic.
My ggggg uncle was Rutherford B. Hayes, the 19th President of the United States.
Off the top of my head, I am a 5th cousin to Audie Murphy, and a 4th cousin some number times removed to Gen. James Longstreet.
Some of the more interesting family lines are on my mother's side. One line, the Cornwalls, traces back to a number of Kings of England, France, Jerusalem, and Emperors of the Holy Roman Empire. Most are my grandfathers 20 times back or so. I'd have to dig out the paperwork to give you the exact details.
If you dig back far enough, you are probably related to these guys, too.