William Emmett Studwell (18 March 1936 – 2 August 2010) was an American librarian who became known for his knowledge of carols.
Studwell ranked the song first, and said it was "more borrowed, more famous and, frankly, you just hear it more.
Before Christmas each year he would announce the new carol and he would be invited to interviews with the media where he was quizzed on his choice.
The day before he died he dictated a letter to his daughter which recorded his selection of a carol for 2010.
Studwell fittingly chose We Wish You a Merry Christmas which is "frequently the final piece in carol performances sessions".