One of the most interesting Irish Scots links for me surrounds the beautiful air of the song, '? Cailín Deas Crúite na mBó' (Pretty Girl Milking Her Cow) which, according to Breandán Breathnach, was composed by the murdered secretary/lover of Mary Queen of Scots, David Rizzio
The claim has been disputed but Breathnach was far too formidable researcher to have made such a claim without evidence, in my opinion   
Jim Carroll