Maybe it was a mistake, Doc. Maybe that grave wasn't yours. The...
Marty McFly: Maybe it was a mistake, Doc. Maybe that grave wasn't yours. There could've been another Emmett Brown back in 1885.
Young Doc: No.
Marty McFly: Didn't you have any relatives here back then?
Young Doc: The Browns didn't come to Hill Valley until 1908, and then they were the Von Brauns. My father changed our name during the First World War.