This is a German as played by Harry Bradley (2014) in a duet with Colm Gannon. He credits it to Francie Mooney of Gaoth Dobhair.
this has been recorded by Altan , I think the cd was ‘Runaway Sunday’ -
Francie Mooney is [was? not sure if he’s still going]
Maire ni Maonigh’s dad
Ah yes, indeed — identical setting there. Makes sense then. :)
If any one is interested. The link to this page from Steph Geremia "Up She Flew" Album "Christmas at Spiddal, Donegal" she plays "Donegal Mazurka" a different tune from the one above and not on the tune database at the moment.