From the Christmas Carol Songbook:
cantorion.org/ ... tmas-Carol-Songbook-Voice-SATB
"What Child Is This?" is a Christmas carol whose lyrics were written by William Chatterton Dix, in 1865. At the time of composing the carol, Dix worked as an insurance company manager and had been struck by a severe illness. While recovering, he underwent a spiritual renewal that led him to write several hymns, including lyrics to this carol that was subsequently set to the tune of "Greensleeves", a traditional English folk song. Although it was written in Great Britain, the carol is more popular in the United States than in its country of origin today.
The above text from the Wikipedia article "What Child Is This?" text is available under CC BY-SA 3.0.

綠袖子（）為一首傳統的英格蘭民謠，在16世紀期間開始流行於英格蘭民間，屬羅曼尼斯卡（）系歌曲。
The above text from the Wikipedia article "綠袖子" text is available under CC BY-SA 3.0.