I found your old post on the Ancestry.com board, and hope you are still active. My great-grandmother was Bertha "Emilie" Timm (b. 1856) an older sister to your Frederick. She married Herman Friedrich Wilhelm Zastrow and lived in Concord, WI. Her son (my grandfather) Heino Zastrow moved to Genoa Junction (now Genoa City) WI, where he worked in the local hotel for his uncle Albert Timm (b. 1861).
Do you have more information about the Timm family? Thank you for any assistance!