Johann Gottfried Walther (18 September 1684 – 23 March 1748) was a German music theorist, organist, composer, and lexicographer of the Baroque era.
Walther was born at Erfurt. Not only was his life almost exactly contemporaneous to that of Johann Sebastian Bach, he was the famous composer's cousin.
Two different verses of the chorale 'Wachet Auf, ruft uns die stimme'.