The Curragh of Kildare springs to mind.
However, I think all other folksingers help the misconceptions, because of the 'pub-Irish' accent we adopt when singing an Irish song.

The Irish, of course, sing EVERYTHING with an Irish accent regardless of origin, so if we learned the song from them, we do tend to perpetuate the notion.

This slant on the thread reminds me of a short-lived group I was in. Our first-half closer was 'The Banana-Boat Song,' but claiming that we learned it from a poor recording, we sang it in upper-crust English accents, whilst wearing bowler-hats and carrying umbrellas.
Hope no-one learned it from us.