I am looking for information on Nicolaus Friederichs of Gerolstein, Rheinland, Preussen. He was married to Anna Dubbich (Duppich) on 4 Aug. 1825. Their son, Josef, my great great grandfather, was born in Gerolstein on 31 Oct. 1828. At some point Josef/ph came to the US. His son, Peter, my great grandfather, was born in Michigan in 1863. I am looking for information on when they came to this country, brothers and sisters, etc. Thanks for any assistance.