I am looking for information on John and Anna WYSS. John's dates are abt. 1814 – 1894. Anna's are 1842 – 1936. Both are buried in Maries County, Missouri as are at least some of their children. What I'm able to piece together from cemetery, census, and death certificate information includes:

John was probably from Switzerland and Anna was from Ohio.
Anna's maiden name was SCHMIDT.
They may have had 10 children. I have identified: John Crystal, William, Amelia (or Millie or Mildred), Monroe, Sopha, and Dory.

Does anyone else have any information on this family?