Boto von Querenburg wrote a book on general topology, which is one of the standard source in German. According to Wikipedia the name actually stands for the authors Gunter Bengel, Hans-Dieter Coldewey, Klaus Funcke, Edelgard Gramberg, Norbert Peczynski, Andreas Stieglitz, Elmar Vogt and Heiner Zieschang. The name Boto was chosen as an abbreviation of "Bochum topologists" and the University of Bochum is in a part of the town called Querenburg.