Mick, I chose the Roud number for my "Sing We All Merrily" page just from the song title; this was probably a mis-match.

Thanks for pointing me to the Janet Blunt collection at the EFDSS. There I found Linda Welch's "Sing We Are Merrily! Christmas Is Here" at
https://archives.vwml.org/records/JHB/13/9 but with the Roud number 13314, so I put that on my page now.

Of course Hannah James "rewrote and added verses to this song" so her version looks quite different.