I have an ancestor named Caroline Eiermann who appears to have had relatives in Ohio. (My family pages on ancestry are public.
http://trees.ancestry.com/tree/24108281/person/1970954005)
Here is the information I have been able to gather based on documents found on ancestry, Familysearch, New York vital records, and other sources. To the best that I have been able to figure, she was born about 1847 in Munich. She apparantly had a son named Joe Eiermann. She came to the United States around 1867, and married Karl Bruderle in New York City.
She had a sister named Anna Eiermann who married Josef Weisser and had at least one daughter named Josephine.
In 1884, possibly after she was widowed, there was a Caroline Bruderle in the Columbus, Ohio street directory living at 24 1/2 Main, Columbus, Ohio, USA. I noticed there were Eiermanns living in the same town.
Many years later as a widow, Carolline married John Graham. From that marriage certificate I learned that her parents are Barbara Buchner and Michael Eiermann.