"I was in Kentucky once, a long time ago. The Hatfields have had three feuds. Somehow, there's always Hatfields left." (from A Man Called Trent, by Louis L'Amour)
I do not know about the claim of three feuds. Louis may have researched that, or it may be pure fiction. However, the Hatfields were downright mean, I know that. In this novel, however, they were on the side of the good guys.