There are possible matches to your query - except for the Magdalena (1845-1876) - in "Milwaukee's German Newspapers; an index of death notices and related items" (1844-1950).
There are entries for Erdmann and Erdman in the German newspapers. There are even Schlaupitz entries.
For more specific information contact:
Gary Rebholz, compiler/editor
Indexing Milwaukee's German newspapers continuously since 2007... helping to access our historic German-American culture.