Frugal what? Flugel bugle? What a funny name for a jazz horn. What is it and why is it called something so funny? The flugelhorn is part of the brass family of instruments. These musical instruments were traditionally made from and continue to be mostly made from the metal brass. The name is thought to come from the German word “wing” which makes the name flugelhorn “wing horn”. The flugelhorn is closely related to the trumpet and cornet.