My great-great grandfather Charles (Carl) Siettmann (wife Emelie) listed in various places: Posen, Pruessen, West Preussen as where he was from. He listed on the census that he immigrated in 1880 although his children were born in the US prior to that, and we believe he had come over and gone back to Germany. I am looking for any information from the Posen area for birth records (Feb 23, 1841) or any other information on the Siettmann name. TY!