Bix Beiderbecke (March 10, 1903 – August 6, 1931) was a notable jazz cornet player. It was widely believed, for many years, that Beiderbecke's real name was Leon Bismark Beiderbecke. It is now known that this — like so many other myths about Beiderbecke — is untrue. His real name was Leon Bix Beiderbecke. Bismark was a family name, reflecting the family's German origins, but it was not given to Beiderbecke. "Bix" was a family nickname of his father and older brother, given him as a proper name.