This is incredible! Ralph C. Lincoln is an eleventh generation Lincoln. And he just so happens to have the same great-grandfather as one of America's favorite presidents. If you head to Pennsylvania and visit the small cemetery in Fayette County, you'll see where the members of the Lincoln family were buried! You'll see Abraham Lincoln's great Uncle Mordecai, who fought in the American Revolution, and his son, Benjamin. Mordecai Lincoln is his fifth-generation great-grandfather, which makes Ralph the third cousin of the president.