I agree with Malcolm- 'George Jeems' (which I have never heard of before) is The Lass of Roch Royal- the second major connection is the exchange of rings theme, and taken with the 'who will shoe' verses forms the whole of the song as given here.

The 'who will shoe' verses do indeed appear as floating verses in other places, and that appears to be the case in THE FALSE TRUE-LOVER above.