I dont have the Irish for this but Mary Ohara's Maidrin Ruadi is described as an example of a Macronic song, so I would think is In Dulci Jublio by Michael Pretorius , a classic Christmas song, and so is the classic Jewish joke
Oedipus Schmoedipus--what's it matter so long as he loves his mother.
Here is the English of MAIDRIN RUADH (The Little Fox)
The little red fox,
The little red fox so ugly
The little red fox lying among the rushes
And the top of his two ears sticking up
VERSE 1 As I was walking up over Sliabh Luachra
HTML line breaks added. --JoeClone, 31-Mar-02.