From the top of my head...He had 20 children, 9 daughters and 11 sons. He was married twice where his first wife died giving birth to his 9:th and he re-married his cousin about a year later (she 24, he 40). Some says for practical reasons but she delivered another 11 so there must been something else too

. But as Chris said, many died in young age from different kind of diseases.
Bach was very early in his career about to loose his position and is that has happened, we might never known his music at all. When he was 17, he secretly invited a girl up the organ late in the evening but they were both caught making out by the janitor and reported to the priest. By that time in Germany, women were not even allowed up to the organ and doing a lot worse thing in the house of God was perhaps not the smartest move ever by Johann. Only because his obvious talent and that the head of the church defended him, he kept his position. Many thanks to him...whoever he was.
And yeah, to your recording Chris

. High quality stuff as usual and I have nothing to add or niggle about. I just leaned back and enjoyed.