This discography that artbrooks posted a link to is far from complete; at least, it doesn't list all the tracks on all the albums.

Judy Collins sang something called GAELIC LULLABY on her album of lullabies called "Baby's Bedtime" on the Lightyear label, 1990. Authorship (or possibly just the arrangement) is credited to Ernest Troost.

I listened to a sound sample, and it seems to be the same song that is discussed in the thread Origins: Name to this song and origins?. The lyrics are posted there.