The fact that this piece once was numbered as BWV Anh II 47 means that is was considered to be possibly a piece by Bach. Later it was established that it was in fact written by Johann Peter Kellner. The misattribution to J.S. Bach however is understandable. Kellner wrote an effective piece based on this famous melody, with long flowing lines, superb voice leading and coloufull embelishments.
I made two recordings, and could not decide which one I liked best. So I upload them both..