There are no less than 4 copies of Sidney Owenson's translation of "Ned of the Hills" into English in the Levy collection (from her 'Twelve Original Hiberian Melodies, 1805). I suspect her original was that sung by her father Robert Owenson (an adopted English name, born Mac Eoghain in 1744) in a Dublin concert at the Theatre Royal, Cross Street, in 1778, "Emhun uh Chnuick" (but not known to have survived in a printed copy).