It is initials of Takarazuka Creative Arts.
While Shepherds Watched is a Christmas carol with the initials WSW.
The Christmas song with the initials Z C is "Zither Carol". The song is a Bohemian/Czech Carol. There are at least two versions of the carol.
The song that contains the initials OLTOB is Oh Little Town Of Bethlehem.
The Christmas song with the initials WIHIYS is Who Is He in Yonder Stall.
in the bleak mid-winter
"The Holly and the Ivy," traditional English carol.
The real book that was made the Christmas carol
The Christmas carol with the initials DDMOH is "Ding Dong! Merrily on High."
A virgin most pure
Nuttin' For Christmas.
Walking in the Air.