Share 'Help! (Traditional Welsh or Celtic Christmas folk song)'

Dear friends, I'm begging your assistance this holiday season. My old mission president has commissioned a tale for his family Christmas morn, and I've pinned down the tale, but want to lace an old Christmas folk tune with it, preferably from England or Wales (where the dear fellow served as a missionary decades ago). Ideally, the tune would carry its own lyrics--something about giving, feedin...