Fredo (Frederico) Corleone is a fictional character in Mario Puzo's novel The Godfather. Fredo is portrayed by American actor John Cazale in the Francis Ford Coppola film adaptation and in the sequel, The Godfather Part II.
He is the second son of the mafia don Vito Corleone (Marlon Brando and Robert De Niro). Fredo is the younger brother of Sonny (James Caan) and the elder brother to Michael (Al Pacino) and sister, Connie (Talia Shire).
Being weaker and less intelligent than his brothers, Fredo has little power or status within the Corleone crime family. The infant Fredo had pneumonia. In the novel, Fredo's primary weakness is his womanizing, a habit he develops after moving to Las Vegas and which earns his father's disfavor. In the films, Fredo's feelings of personal inadequacy and his inability to act effectively on his own behalf are character flaws leading to greater consequences....LESS