"I believe Gertrude is my GG grandmother and Siegfried is my great grandmother's brother. what do you know of them?"
Just that there were death notices for both those Ferlitsch names in Milwaukee's German newspapers, and they are listed in "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... helping family researchers collect the evidence of our historic immigrant cultures.