Swedish children believe that on Christmas Eve a lively elf named Jultomten brings gifts from Santa.
There is no anagram. You need another E to spell the anagram "winter wonderland."
The First Noel
http://wordsmith.org/anagram/anagram.cgi?anagram=merrychristmas&t=1000&a=n
The Shepherds' Farewell
The anagram is "scrooge" (tightwad, from Scrooge of A Christmas Carol).
The anagram is the proper noun Wenceslas, the king from the Christmas song.
The letters in glean spell angel.
The anagram is Weihnachten, the German word for Christmas Day.
The anagram is "season" (i.e. the Christmas season).
The anagram is the proper noun Rudolph (the red-nosed reindeer).
The anagram is "scrooge" from the proper name Scrooge in "A Christmas Carol" by Dickens.
There is no common anagram. With another R instead of N, it would be "brewery." The proper noun anagram is Newbery, an annual children's book award.