Are you sure that's correct? Saviano said ONLY the Nuvolettas were cosa nostra. The connection between the Casalesi and the cosa nostra died with Bardellino, if I'm not mistaken.
I can't recall who the Gionta people are though...
Antonio Iovine speaks of cosa nostra in his recent statements, the casalesi have their own inductions they swear on a local guardian angel. I forgot the name.