these are the ones I sing this time of year:
Ewan MacColl song "Jesus was a working man ..." (I don't recall the title.) I might add the lyrics as I don't think it's on the 'Cat.
Woody Guthrie's Pretty Boy Floyd ("here's a Christmas dinner for the families on relief")
Quiet Land of Erin (to be found in a thread)- in the original Irish language version the homesick poet reflects on many a Christmas (or December - Nollaig means both the month and the day)spent in Ireland.