yuma music. Mar 26, 2016 · The lovely Irish ballad “Danny Boy” is actually based on an old traditional melody called “Londonderry Air.” And if you’ve ever checked out the derrieres</i> in London, you can see why they changed the title. <i>[Rim shot.]</i> The lyrics were added later, as a poignant message from a father to his absent son.</p> <p>To play “Danny Boy” on guitar, play.