My grandfather researched it back to a man beheaded for rape, murder, and stealing horses, in what became Bavaria, in the 800's AD.
Following my geneology back I'm related to some rather dubious fellows, 1 burgermeister (spelling?), 1 American President (Reagan), 2 serial killers, most of the Irish mob in Boston, alot of WW1 and WW2 vets, and possibly a girl I dated in high school (we may have had a common ancestor who was born in 1650ish).