Mr. Red, It's "joyeaux Nöel," I believe.  (Not sure about the "x," because that would make the adjective plural.  Seems like it should be "joyeau Nöel," but that doesn't look right.)

An auditory and visual Christmas pun I borrowed to make Christmas cards is a pooch in a Santa hat scratching his ear.  The caption is
 

           Fleece Navidog!

 
 

SharonA, My version of the Deck the Hall pun is a wrinkled, grey-bearded gnome in full Father Christmas regalia with the caption :
 

Carroll, The Ancient Yuletide Troll

I have a song about that troll, in fact.  I'll  post it separately.
 

Sonja