Thanks for the link, Gavin. You did a good job of fitting the lyrics and tune together. It sounds right.
I just went to the DT to see what this tune is, and found myself thinking "I've heard this before."
Yes, it has been used for the Christmas song
"Bles-sed be that maid, Ma-rie-ee;
bo-orn He was of he-r bo-o-dy."