RUG MUIRE MAC DO DHIA

Rug Muire mac do Dhia,
íosa Chriost, triath na reann,
Maireann dá éis ina hógh,
An bhean is dóigh do gach dall.

Buime a's máthair Mhic Dé Bhuí,
Bean mar í ní fhaca súil,
Bean ler osclaíodh Flaitheas Dé,
Do mholfas mé os gach dúil.

Ní cosúil í le mná,
Muire Mjhór an bláth nach críon,
Ní cosúil balsam le moirt,
Le lionn goirt ní cosúil fion.


Source: "Fáilte Roimh Íosagán" , cassette tape and booklet produced by "Cór an Ghrianáin", the choir that sings at a long-established weekly Irish-language mass in Derry City. "Fáilte Roimh Íosagán" is dedicated to the memory of one of the founding members of the choir, Prionsias Ó Ceallaigh.

"Rug Muire mac do Dhia" means "(Holy)Mary bore a son to God"

I don't know if there is any difference between these words and the words sung by Horslips. I do remember the seasonal "Drive the Cold Winter Away" album, which had traditional song and was one of the rock group's more 'folksy' productions. There were two other Gaelic songs on the album that I recall and both are already posted at Mudcat, "Don Oíche Úd i mBeithil" (Irish) and "Ny Kirree fo Niaghtey" (Manx).