I am looking for info on my g-g-grandfather--John Henry Mackey and his wife Catharine Gertrude. His birth name was Johan Henrich Macke (spelling may vary).I think he was born in 1818 in Oldenburg. He came to the US prior to 1850. In 1850 he married Catharine Getrude Miller (possibly born Gertrude Terveh in 1832 in Alsace). I think this was his second wife. They appear on the 1850 census in Cincinnati as John H. Macke and Getrude Macke. Later they moved to Brown County Indiana and appear on the 1860 census there. They had 8 children who lived to adulthood. He died in 1870 and is buried in Brown County Indiana.
Several of their children later moved to Nebraska.
My name is Randall Mackey (from Bancroft, Nebraska). My father is Leland, grandfather is Oscar, great-grandfather is George, g-g-grandfather is John Henry (Johan Henrich).
Any help or leads would be appreciated. I am looking for when they came to the US and any earlier ancestors.