I bet you didn't know that JS Bach had another composer son as well as CPE Bach. Neither did I but now that I have discovered his music it might be almost as good as his father's. Almost and he was more prolific than his father as can be seen in the catalogue of his work.
PDQ Bach was the only forgotten son of Johann Sebastien Bach and his compositions were discovered some fifty years ago by the musicologist Peter Schickele.
P.D.Q. Bach - Fanfare for the Common Cold
P.D.Q. Bach - The Short-Tempered Clavier - I. C major
P.D.Q. Bach - Four Folk Song Upsettings
Cantata Blaues Gras - German Captions; English Subtitles
Itzhak Perlman and Peter Schickele, Part 2