Christmas Quiz 2020 Christmas Songs And Carols 6/1

[poodledoo]

christmas songs/carols with the following number of letters:
30) 5,3,5
31) 9,8,2,2,4,4
33) 6,6,6,6
37) 1,7,4

[bibster]

30 marys boy child
31 chestnuts roasting on an open fire
37 a rocking hymn

[bobbinwales]

seen this as nowell nowell nowell nowell?
Have letters been given for some of these as a remember seeing an annagram (though not quite right) for Marys Boy Child??

[poodledoo]

thank you for your answers. have since found the answer to number 33 on another posting.

[Mexican18]

37. A winter's tale.