Can you tell me where you found the info. that Nicholas 1730, and Johann 1763 were your ancestors? Yes there are at least 2 missing generations.
Your Mathias, b 1860, was the son of John Kartes and Elizabeth Weber. Elizabeth was the dau of Mathias Weber and Maria Rauen. I have not been able to find the parentage of John. He may have been the son of Mathias and Caterine Kartes who were the parents of Peter Kartes who lived in Oak Creek, Milwaukee Co. Wisc. John married Elizabeth Weber in Oak Creek about 1857.
What I have on the family of Mathias and Walburga are the names of 11 of their 12 children....Susana, Anthony, Mathias R., Charles, Bernard E., Francis Xavier, Apalonia, John, Clarence, Viola, and Theodore F..
I will send you more data on the family via email.