I would be very interested in this information.Over time John Fleck went by the names: Johannes, Hannes, and finally John. He would have been born in the 1790's.
Does the bible list John's wife.She was Elizabeth Garverick.If that information is in the bible then I know we are talkin about the same person.He died in 1831. He had several children.The only name I know for sure is Charles.
I have looked at the line you are talking about several times but could never prove that I was looking at the right person.Are we talking about the Fleck line that originated in the US from Conrad Fleck?