According to the cover, the singer of Aililiú na Gamhna on the Ceolta Gael cassette should be Cáit Mhacionnraic.

According to the notes on Ailliliú na Gamhna in "Cuisle an Ceoil" (An Roinn Oideachais, Dublin 1976), this song has the same story as that of the other song I mentioned, Na Gamhna Geala, which Tríona Ní Dhomhnaill has recorded. A woman who has married a rich man is unhappy and remembers the days when she herded the cattle. In some stories, say the notes in "Cuisle an Ceoil", the rich man is a ship's captain. Previous published sources are the Irish journals Éigse iii,4, p.257 & following, and Béaloideas XX, pp.70-71

See also the previous thread with lyrics, translation, names of artists. A search for the word Gamhna finds that thread and ideally additional information would have been added to the old thread rather than a new thread being started.

Additionally, if you do a Google search, you will find other pages bearing the lyrics and also some mp3 sound files