I don't know what book IbidPerez read but.....

SPOILER

Moe Greene was murdered in 1952 by Al Neri. Al Neri murdered Emilio Barzini in 1955. Rocco Lampon emurdered Philip Tattaglia in 1955. A Corleone Button (Maybe Calo) murdered Fabrizzio in a Buffalo Restaurant in 1955. Peter Clemenza strangled Carlo Rizzi in 1955. Sal tessio was killed in 1955.

Ottilio (Carmine) Cuneo and Anthony (Victor) Stracci lived through the book!