HK is right. Larry and Joe Gallo were 100% Italian. Vincent (Filipelli) Philipps of Philly was 100% paisano as well, just either the Ellis Island people changed his last name back in the days or he did.
New England
Cadilliac Frank Salemme - 50% Irish
Jimmy Martarano - 25% Jewish and rest Italian
Billy Angelesco - 50% Irish
Greg Costa - 50% Portuguese
Pryce Quintana - 50% Jewish
Frank Salemme Jr - 75% Irish
John Salemme - 50% Irish
Gambino
John (Junior) Gotti - 25% Jewish and rest Italian
Craig DePalma - 50% Jewish
Andrew Campos - 50% Puerto Rican
Pittsburgh
Charles Porter - 50% Anglo-American
Philadelphia
John Veasey - 50% Anglo-American
Joseph Sodano - 25% Jewish and rest Italian
Frank Martines - 25% Spaniard and rest Italian
Chicago
James "Jimmy" Marcello - 50% Irish
Genovese
Albert Gallo - 50% Irish
Detroit
Joseph Massei - 50% Anglo-American
Robert La Puma - 50% Polish