Do you happen to have any dates for the Hollingers that you have mentioned? The Hannah Hollinger that was married to James H. Patterson was born around 1831. Her birthplace on the 1871 census for Canada is shown as Ireland. She had a brother John (may have been a major) who had a daughter Katie. She also had another brother who had a daughter Hannah and a daughter Victoria. I also don't know if they are German or Irish as one of the family trees that I came across in my family shows the Hollingers as German descent. Any other info you may have would be appreciated. Thanks