Not sure if this is your John Herzberg as I don't know the birth or death date of mine. I know Philip Herzberg b? d? m Elizabeth maiden name unknown she was born abt 22 apr 1830 and died 8 Apr 1887 Iowa county, Iowa near Marengo. 4 known children one of them being my ggreat grandma. They are William Herzberg b 21 June 1858 Davenport Iowa d 1943 Victor, Iowa county, Iowa, He married Emma Paeper. John W. Herzberg b? d? was married to a Carrie maiden name unknown, she died at a very young age and then I can't find any records of my John Herzberg. Carrie was b 23 Jan 1867 d 7 July 1892 Buried South of Ladora, Iowa county, Iowa. next was Mary Herzberg b13 Aug 1856 Quebec Canada d 26 Nov 1932 Marengo, Iowa county, Iowa she married Charles Kiel. next is my ggreat grandma Elizabeth Katherine Herzberg b 14 Mar 1854 Waterloo Canada d 16 June 1924 Marengo, Iowa county, Iowa married Henry Frederick Goettsch. Some of these children were born in Canada and then moved to Davenport Iowa and then the family moved to Iowa county Iowa near Marengo. If this sounds familair to anyone please contact me. Thanks!