I've often wondered this question about whether or not any non-Italians have been made. In my opinion, there must have been a few guys over the past 100 years that were made that should not have been (according to the rules regarding lineage). Guys in the mafia have broken every single rule they've made. They've dealt drugs, slept with made guys' wives, disrespected the boss, etc. There is no reason to think that the rule regarding made guys having the proper Italian lineage has not been broken. The only reason we don't know for sure if it has been broken is anybody that was made and should not have been would never admit that their lineage did not meet the mob's standards.