Outlaws and gunfighters -- doesn't every family need a few colorful characters in it's history?
I haven't found any real James Gang connections yet, but --
Ther's a chap named Charles Ray "Pony" Diehl / Deal that appears to be more than just legend, reportedly a former member of the John Kinney Gang, Diehl joined the Jesse Evans Gang during New Mexico's Lincoln County War. Afterwards, he went to Arizona and joined the Clanton "Red Sasch" Cow-boys. He was sought after by Wyatt Earp during the Earp Vendetta Ride but wasn't found. He claimed to have killed Johnny O'Rourke in 1882, after O'Rourke allegedly killed his friend, Johnny Ringo. There is even a Wikipedia entry for "Pony Diehl".
Now, if you like to play with those seven degrees of Kevin Bacon games, and it seems that most of us do just that, intentionally or not, well, Pony Deal was a friend of Johnny Ringo (John Peters Ringo, b May 3, 1850), and Ringo was a boyhood neighbor & contemporary of the James boys, and a cosuin of Cole Younger.So there is a slight connection of a Dihel to the James Gang.I don't know about George W ...