Best to post your individual immigrant ancestors here with all the information you have about each, namely
name with variations
exact or best approx birth date
siblings or spouse or children also born in Germany
what sources you have checked so far, i.e. church
records, death records, passenger lists, obits, etc.
The best way to identify the town your ancestors
is to do exhaustive research here in the US. But perhaps
if you can post as much of the info as you have we may
be able to find them.