My great grandfather was Wilhelm Friedrick Malzahn I believe originally from Prussia. He was born in 1867 and may have been in Mecklenberg, Germany at some time before he emigrated. He came to the USA about 1890 on the ship Switzerland. He married Ida Kaventel in 1893 in Philadelphia, PA. They had three children 1 son, Ed, 2 daughters, Clara and Alice. About 1920 they moved to Denver, Colorado and he became a citizen of the USA about 1936-1938. I think Ida came from Prussia as well both would have lived around Marienwerder or Kliens Kreb which is now consider Malbork and Rackowitz Poland I believe. Any information would be helpful.