Speaking of co-incidences my name in Gaelic is Deaglán Ó Fáith which means descended from the Fáith.

The word Piseog is often used colloqually in Ireland to mean superstition in general. I've alo heard the word sung as Mist-O which I presumed meant that his mind went foggy.

Given that the song is relatively recent (35-40 years at this stage) it would appear that the process has been working overtime on this one.