I have a little info on this family. Johan's son, Albert was married to my grandmother's (Rosa Hansen Voss)sister Alma Hansen. Johan's parents were Carl Johan Brandenburg born 1828 in Assinghausen, Hochsauerlandkreis, Nordrhein-Westfalen, Germany & died aft 1880 in Clinton Co, IA & Wilhelmina Marie Staeding born Oct 18,1828 in Assinghausen, Hochsauerlandkreis, Nordrhein-Westfalen, Germany. She died Nov 7,1880 in Lyons, Clinton Co, IA. They were married 19 Nov 1854 in Assinghausen, Westfalen, Prussia, Germany. They arrived in New York from Hamburg Oct 16 1869. They had 4 daughters & 2 sons.