From this, there is only 1 line of direct descendancy that shows up that isn't currently documented. From JS Bach, to Bach-222 (Johann Christoph Friedrich Bach) to his children. The profile lists 1 child, Bach-223 (Wilhelm Friedrich Ernst Bach) but the diagram shows 9 children.
Of those, 5 children are from Anna Phillippine Frederike Bach and her husband Ernst Carl von Coulson: Joh. Christ. Friedr. von Coulson, Wilh. Friedrich Carl von Coulson, Helen Lucie von Coulson, Carl Gotlieb von Coulson, and August Wilhelm von Coulson.
At this point we have additional descendants of Bach, but they are no longer "Bach's". I'm OK with pursuing the additional lines from the diagram with the understanding that we run out of the Bach name in the direct lines at this stage.
The diagram does outline additional lines that run from his family, either up his line or sideways (brothers and sisters). So if we're looking for additional familial connections we should consider adding the whole chart.
Very cool chart, by the way, Helmut. Thanks!