Not sure if any of the following have been mentioned.
I have been know to sing all but one (not very well) but never even tried the last mentioned classic
The Green Fields of Goats Dobhair or Weedore (Performed by Clannad)
Leaving Nancy (Eric Bogle)
Amelia ( John Tams)
Will I see Thee More (John McCusker and John Tams)
Farewell (Robbie Burns)
Farewell to Anzac (Cicely Fox Smith)