Jim, In his book “Narrative Singing in Ireland” published in 1993 Hugh Shields says “Only two ballads seem to have gone into Irish retaining something of the ballad character”. He then names them as “Cá rabhais ar Feadh an Lae uaim” a version of Lord Randal (Child 12) collected in Roscommon in 1905 and “Muire agus Naomh Ioseph” The Cherry Tree Carol (Child 54) collected in 1897 also in Roscommon. Both edited by Douglas Hyde. Perhaps Muire agus Naomh Ioseph should be included in your list?