The Last Ride of the Dalton Gang

Billy Doolin:
Well, Bob, I'd like for you to explain something to me. Why does it have to be called 'The Dalton Gang'? You explain that to me, please?

Bob Dalton:
It's simple Billy. Gangs is always called after their leader, like...ah, Jesse and Younger.

Billy Doolin:
Well now, I don't see any reason why I can't be the leader.

Bob Dalton:
Billy, in the first place, you don't have any leadership qualities...which I do. And the second place, a 'Doolin Gang' sounds kind of dumb. I mean, what kind of name is Doolin?