Salviati and Sagredo took their names from two of Galileo's early friends, the former a learned Florentine, the latter a distinguished Venetian gentleman; Simplicio ostensibly derived his from the Cilician commentator of Aristotle, but the choice was doubtless instigated by a sarcastic regard to the double meaning of the word.
A bad news costume has a double meaning in that your costume is literally bad news plastered all over your body.
Erin's special agent title has a double-meaning - she is both an insurance agent and a spy.
At first glance they seem illegal, (such as a person's first name), but they have a double meaning.
It is unfortunate that such a double meaning of the word should have grown up, for it is productive of not a little confusion of thought.