There is a death notice and obit. with photo for an Andrew Niedermeyer found in local German language newspapers. About 50 combined entries for both spellings Niedermeyer & Niedermeier in the growing data.
"Milwaukee's German Newspapers; an index of death notices and related items" (1844-1950).
Gary Rebholz, compiler/editor
Indexing Milwaukee's German newspapers continuously since 2007 ... it's about German-American culture, not data.