Betty Duke thinks that her great-great-grandfather James L. Courtney was actually the outlaw Jesse James.
The first thing that made Betty believe that maybe these old tales were true was an old family photo she found of her great-grandfather Courtney’s mother. The woman in the photo was missing her right arm; James’s mother was also known to have lost her right arm during a dynamite explosion in her home.
If that weren’t enough, other evidence kept piling up. For instance, Betty found that her great-grandfather “accidentally” signed his diary “J. James” on several occasions. [Link]This seems like pretty weak evidence to me. After all, seven out ten women in 19th-century America lost their right arms to dynamite explosions. (True fact. Look it up.) And I have been known to "accidentally" sign my diary "Mr. Angelina Jolie," but that doesn't make me Brad Pitt.