This seems to be the air to an obscure Scottish Gaelic song, but I know nothing about it, and I can’t find it in my collection.
My wife and I are looking at her CD liner notes for this tune … it came from a collection called An Laoidhean Nollaig that she learned when she was at Sabhal Mor Ostaig on Skye. Noone at the school knew the origin of the song at that time. I don’t see the collection on the SMO digitized collections. Good luck.