Johann Bernhard Bach(1676-1749) depended the Erfurt family line, & he was Sebastian's second cousin( not a nephew).
Ouverture-Suite in D Dur
original source = Mus.ms.Bach St 318 Main copiest is Johann Sebastian.
1. Ouverture : French style
bar1-16 : A Part(2/2)
bar17-115 : B Part(6/8)
bar116-129 : C Part(2/2)