There's some evidence to suggest that Capone was a Camorra member before he became part of Cosa Nostra. In 1928, Joe Masseria inducted Capone into his Family and promoted him to Capodecina with the authority to make 10 members in Chicago. So Capone started off as a Camorrista and was then brought into the Masseria Family despite operating in Chicago. After the Castellammarese war when Salvatore Maranzano became Capo Dei Capi, he officially recognised Capone as the Rappresentante of the Chicago Family. Then after Maranzano's murder, Capone was given a founding seat on the Commission.


IIRC there's also some evidence that Genovese was a Camorra member. He was an inducted member of the Masseria Family by the 1920s as well anyway and was promoted to Sottocapo when Luciano took over.