Frederick married Rosburg, Dorthea Friedricke Maria "Doris" on 19 Oct 1873 in Eldorado Township, Benton, Iowa, USA. Dorthea (daughter of Rosburg, John Christopher and Hamann, Julia Catharina) was born in 1856 in Harmsdorf, Ostholstein, Schleswig-Holstein, Germany; died in Iowa, USA; was buried in Iowa, USA. [Group Sheet] [Family Chart]