There's at least one Leitzmann match to your list (Friederike) in "Milwaukee's German Newspapers; an index of death notices and related items" (1844-1950). Some other surnames linked with Leitzmann are Hermann, Kartschoke / Kartschocke and Plötzke / Ploetzke.
An out-dated printed version of the index is cataloged and shelved at the local library, but I'll also verify entries via email.
Gary Rebholz, compiler/editor
Indexing Milwaukee's German newspapers continuously since 2007 ... it's about our historic German-American culture, not data.