Peter Hans, b.22Sep 1830, Flensburg

Looking for information on Peter Hans Marxen, born 22 Spet 1830 in Flensburg Schleswig, Denmark (Germany).Married Anna Monicous.Peter & Anna had 4 children:Dorothea, Charlotte Margaratha, John Christain and Nicholas.John Christain Marxen is my grandfather.Looking for information on Peter Hans, his siblings and parents; and other 3 children of Peter Hans & Anna.John Christain Marxen immigrated to US in 1882 and lived in Iowa and Nebraska.Information on rest of family is unknown.