Hi Jim,
Mrs Moynihan was from the Rathconrath area. I spoke to her son Aodán recently and he told me that she did not sing very much and he certainly never heard her singing this song.
However, she was a singing adjudicator and collector and recorded a lot of singers over the years. He has no idea of the existence or whereabouts of these recordings now unfortunately.
He thinks it likely that Tony got a recording that she made and this is how Tony makes the connection now to Mrs Moynihan.
I will continue to follow up.
Pauline and Patsy Hanley may also have a recording (probably Siney Crotty), they have a big collection of stuff.

Regards - Tony