Just to throw a red herring...
I was recently looking for an extra Folksong or two to complete my latest (No.4) "Folksongs for the Violin" Book. I heard "Cailín Deas Crúite Na Mbo" ("The Pretty Maid Milking the Cow"), and thought "I know that tune! Where have I heard it before?" So, thinking Duet, Dermot, and Beethoven, I searched my vinyl collection for a recording by Victoria de los Angeles and Dietrich Fischer-Dieskau, accompanied by Gerald Moore, singing Beethoven's arrangement of No 9. of 12 Irish Songs. Beethoven called his arrangement of ["Cailín Deas Crúite Na Mbo"] "Oh! would I were but that sweet linnet" (Grove's Op. 255).
The (English) words on the vinyl recording are:-

Oh! would I were but that sweet linnet!
That I had my appletree too!
Could sit all the sunny day on it,
With nothing but singing to do.
I'm weary with toiling and spinning,
And Dermot I never can see,
Nor sure am I Dermot of winning,
There's never good luck for poor me!

Ye saints with the Virgin! believe me,
I join with the priest in your praise!
Contrive but my Dermot to give me,
And I'll love you the length of my days.
In vain would they bid me be wiser,
And never my Dermot to see,
Bad luck to advice and adviser!
Good luck to dear Dermot and me!

Best wishes all,
Lesley Halamek

"Violin Beginner Music" - Folksongs for the Violin Learner