Johann Wilhelm "Rukeli" Trollmann (27 December 1907 – April 1944) was a German Sinti boxer.

[3] On 9 June 1933, he fought for the German light-heavyweight title and although he clearly led by points over his opponent Adolf Witt, the fight was judged "no result".

Trollmann arrived the day of the match with his hair dyed blonde and his face whitened with flour, the caricature of an Aryan.

[1] On 9 June 2010, the anniversary of his championship fight,[8] the German artist collective Bewegung Nurr erected a temporary memorial "9841" in the Berlin Victoria Park to honour Trollmann.

This song was the inspiration for the theathral show My Inv(f)erno... gypsy life which opened the X edition of the International TeatroLab Festival at the Tagliavini theatre in Novellara in March 2019.

In 2016, Dario Fo, recipient of the 1997 Nobel Prize in Literature, published the book Razza di zingaro based on Trollmann's life.