None that's been found. It's a pretty uncommon name, there are only about 6,000 of us. Oddly enough the city I was born in (Mobile, Alabama) has a guy with my exact name living there. Also one of the guards at the Boulder county Jail has the same last name.
I talked about this in another thread, but I might have heard my a character with my last name on South Park, I went to school in Littleton and I SWEAR I know the elementary school teacher that Mr. Garrison is based on. 99.9% it's a coincidence, but I have to wonder.