For anyone still researching this family, there are entries in the index culled from German newspapers published in Milwaukee. For instance, an 1880s family death notice for Richard, parents John & Friedericke.
Contact me directly for full citation/s, look-ups, or copies. I'm happy to provide this information from the most current version of the data.
Milwaukee's German Newspapers; an index of death notices and related items; 1844-1930, addenda 1931-1950