ksh, the Korn Shell, was written by David Korn as an improvement on the Bourne shell. The specification for ksh is public domain and has been reimplemented in pdksh. Most of the really good features are present in GNU bash, the default shell for most Linux systems.
According to an interview with David Korn, the band korn was formed in 1993 to promote the Korn shell. However the official band biography has no mention of this, instead stating a very different history than the interview claims. (it is possible that David Korn's statement was in jest)