I may have responded to this elsewhere, but there are some entries of references to a Christoph Rothweiler in "Milwaukee's German Newspapers; an index of death notices and related items" (1844-1950). These include wedding anniversary photo and bio in 1921, death notices for Christoph in 1930 and references to Christoph and Mrs. in death notices for Clarence M. in 1918.

For more specific information contact:
Gary Rebholz, compiler/editor
Milwaukee Wis.
gary.rebholz@gmail.com
Indexing Milwaukee's German newspapers continuously since 2007... helping to access our historic German-American culture.