"Yon Yonson" is an infinitely recursive poem, nursery rhyme or song, perhaps best known from the novel Slaughterhouse-Five by Kurt Vonnegut, although Vonnegut did not create it.
The song is often sung in a Scandinavian accent (e.g. j pronounced as y, w pronounced as v). This accent is revealed by the name "Yon Yonson," which when recited in American English is usually rendered "Jan Jansen" or "John Johnson." The Swedish pronunciation "Yon Yonson" probably dates the origin of the song to soon after the Swedes' arrival in the United States.
A possible origin of the song is the dialect stage comedy Yon Yonson by Gus Heege and W. D. Coxey (1890). The play's setting included a Minnesota lumber camp. However, no evidence shows that the song was actually performed as part of the play.
Numerous versions of the song exist, but all are similar to the following:
Another version goes:
Another version goes:
Another version goes:
Another version goes:
Another version, according to them, is made by Rafi Lev Colton-Max and his bubby. It goes: