Wilhelm Hans "Willie" Jahn (27 February 1889 – 24 January 1973) was a German track and field athlete who competed in the 1912 Summer Olympics.

His best-known song "Laue Luft kommt blau geflossen" was to set music to the words by German poet Joseph Eichendorff.

He later served in Denmark as an Officer (Major) of the German Armed Forces and contracted tuberculosis in a British POW camp after the war.

The family, which had been scattered due to the Allied terror bombing of Berlin, reunited in a displaced people's camp in Ovelgönne in the late 1940s.

His wife, Maria Jahn (nicknamed "Tuck"), suffered serious health problems from the displacement experience and the unsanitary conditions, which led to her early demise shortly after World War II.