Taladh Chriosta (Lullaby of the Christ Child)
From Wikipedia:Tàladh Chrìosda (Christ's lullaby) is the popular name for the Scottish Gaelic Christmas carol Tàladh ar Slànaigheir (the Lullaby of our Saviour). It is traditionally sung at Midnight Mass in the Outer Hebrides in Scotland. The 29 verses of the hymn date from the 19th century and are intended to represent a lullaby for the Christ Child by the Blessed Virgin. The words are recorded as being composed by Fr. Ranald Rankin of Fort William for the children of Moidart and were originally entitled Tàladh ar Slànuighear (the Lullaby of our Saviour) and sung to a tune called Cumha Mhic Àrois (the Lament for Mac Àrois). The song was popularised among English speakers in the early 20th century by Marjory Kennedy-Fraser under the title The Christ-Child's Lullaby.