Also Vito Genovese is known as "Don Vitone" there. I think that's just a name Costello called him, if anybody else in his family did it, I'm sure they'd be ground fertilizer the next day.
Why, what's so offensive in the Don Vitone nickname to make him mad? Vito Cascio Ferro was called Don Vitazzu, many bosses named Giuseppe are called Don Peppino etc, it's not like Antonino "Ferocious dwarf" Imerti or Toto' "the short one" (u curtu) Riina (also known as "the beast").
