Katharina Kubatcki's family placed their death notices for her in the local German papers in Jan. 1916. That's the only spelling or variation of the surname I can find in the local resource "Milwaukee's German Newspapers; an index of death notices and related items" (1844-1950).
gary.rebholz@gmail.com, originator/compiler/editor, Milwaukee Wis.
Indexing Milwaukee's German newspapers continuously since 2007... for family researchers who want to return some diversity of language and culture back into their historic German-American stories.