A writer called Frank Norman wrote his biography, about being a Barnardo boy, and he used as the title the nickname they were commonly given as school - "Banana Boy".

That'd be one misunderstanding avoided, but another one introduced, though maybe one without the same kind of associations.

Back in the country the boy came from pretty well anyone would know that as song with Barnardo in the title would have to be about an orphan. And noone's heard about the murderer with a similar name.

Anyway, noone takes a blind bit of notice of what title a writer wants for a song - look at Eric Bogle trying to persuade people to use his title, No Man's Land for the song generally referred to as Willie McBride or the Green Fields of France. People tend to use the first line, or a memorable phrase, and a summary of the plot occasionally ("The Orphan Immigrant").