"He was the son of August Hamann and Mathilda Frisch nee Friederici."
Since posting this message, do you have death dates for August and Mathilda? I've indexed those names in my index -- about 175 Hamann entries so far. For more information contact the editor/compiler of "Milwaukee's German Newspapers; an index of death notices and related items" (1844-1950). Indexing firstname.lastname@example.org