I found your Kreis family in the Kulm book
http://www.odessa3.org/collections/towns/link/kulm57.txtIt is under Kreis, Fred and Christina (Reimann). I see the death, and marriage to David Isaak. The children are also listed here. Although the info does not state which Isaak he is from, it may be from the Christian Isaak family who settled in Kulm. I am related to such, distantly, but have a family descendants list from another of this family. I'll take a look and see what I can find out.
John Sailer, Minneapolis, MN