"... Does anyone have any suggestions? ..."
Yes, the local German newspapers where Pauline (Ebert) Knoblauch placed the family death notice for Carl Knoblauch in 1875. These are among the 60+ Knobloch Knoblauch Knoblach entries or references you'll find in "Milwaukee's German Newspapers; an index of death notices and related items" (1844-1950). These papers and the index under construction are not online.
Gary Rebholz, compiler/editor, Milwaukee Wis.
gary.rebholz@gmail.comIndexing Milwaukee's German newspapers continuously since 2007... helping family researchers find their ancestors among Milwaukee's 99%.