Have you collected the family death notices for Joachim Nevermann and Minna Clocksin Nevermann?
I've indexed them from the local German papers. And I have entries for the spellings Klocksin, Klocksien and Klockzien -- but not Clocksin (so far).
For more information contact the editor/compiler of "Milwaukee's German Newspapers; an index of death notices and related items" (1844-1950).
gary.rebholz@gmail.com