"Wiegenlied" (German for 'lullaby') is a cradle song from the collection of German folkloric poems Des Knaben Wunderhorn.
According to a number of sources, the song features Burchard (Bishop of Halberstadt) (c. 1028âÂÂ1088) under the name of "Buko von Halberstadt", who was a "friend of children" and never left his castle without some gifts for his young parishioners. Other authors call him "one of the most popular people of his time" (German: ).
The poem about Buko of Halberstadt became widely known in the Saxon lands. One of the researchers notes that the work was first published in 1732 in the "Collection of some old chronicles" () by .
Source
Over the years and across regions, different texts have been used for the song. This is the text from Des Knaben Wunderhorn.