Drowsy Maggie, Miss McLeod's Reel The Morning Dew The High Reel The Fermoy Lasses Kilfenora Jig(debatable) Drops of brandy...there's a few extremely well known folk tunes whose last chords don't define the key of the piece. The list is endless.Obviously the majority of tunes end in the "home key" but it's by no means a universal rule.