Malcolm, I could see ME mistaking it, if it were loud enough. I did some more poking around as your post indicated there was a song.

This page for St Kevin's Oratory contains a reference: "...sing-song on Saturday night (particularly Kev's 'The Bull of Kildare'."

There's an e-mail address on the page to A 'Kevin'. (Under 'Open House') It looks like a fairly old page, though.