Johnny Fontane (Al Martino) appears in The Godfather as Vito's (Marlon Brando) godson, and his similarities to real-life singer Frank Sinatra did not go unnoticed by the legendary pop star.

Adding to the drama of his arrival, Sinatra was intended to be named after his father, but a mix-up led the priest to name him after his godfather, Frank Garrick. Exhausted from the ordeal ...