Franz Xaver Gruber only found out about it in 1854 when the carol was almost attributed to Michael Haydn, the brother of famed composer Joseph Haydn.

• 弗兰兹?艾克塞瓦?格鲁伯也是到了1854年才为人所知，当时这首歌差点被认为是著名作曲家约瑟夫?海顿的弟弟迈克尔?海顿所创作。