My grandfather's aunt was Appollonia Ofenloch Landgraf, She was married to Philipp Landgraf in Buerdtadt Hesse Germany in 1875. The moved to the US in 1884, and ended up in Chicago
They had 5 children who lived to adulthood. Philipp, Katherina, John, Louise and Frank. The first 3 were born in Germany.
I am trying to trace the children forward as far as possible as their descendants would be my cousins.
There is a bit of a muddle with some of them and I cannot find anything about Katherina and John other than their birth and Immigration.
Any help would be greatly appreciated.