The Genovese family's founders came from the village of Corleone and as we know the Genovese and Corleone family were the strongest of the Five Families. Mario Puzo also presumably used the Bonanno family as inspiration for the Corleone family, such as the father-son relationship and the Bananas War. The Bonanno family also expanded to the Western United States just as the Corleones did.
"It was between the brothers Kay -- I had nothing to do with it."
