"... My Seidls (siblings Anna, John, and Joseph) immigrated to Milwaukee in 1883."
I case it's helpful to your research, there are about 230 Seidl & Seidel entries or references found in the local resource "Milwaukee's German Newspapers; an index of death notices and related items" (1844-1950). These include death notices or obituaries for a couple of different Joseph or John names; but no Grall entries so firstname.lastname@example.org
, originator/compiler/editor, Milwaukee Wis.
Indexing Milwaukee's German newspapers continuously since 2007... helping family researchers find their ancestors among Milwaukee's 99%.