 Erhard Barthmann | Son | Birk, Franken, Kirchenlamitz, Upper Main, Kingdom of Bavaria, German Confederation | 26 December 1829 | Sac City, Sac County, Iowa, United States | 7 July 1914 |
| Johann Georg Barthmann | Grandson | Vordorf, Vordorf, Wunsiedel, Upper Franconia, Kingdom of Bavaria, German Confederation | 19 February 1856 | Sac City, Sac County, Iowa, United States | 20 September 1921 |
| Johann Valentin Barthmann | Grandson | Vordorf, Vordorf, Wunsiedel, Wunsiedel, Upper Franconia, Kingdom of Bavaria, German Confederation | 26 December 1862 | Vance Creek, Barron County, Wisconsin, United States | 10 October 1920 |
 Anna Margaretha Barthmann | Granddaughter | Vordorf, Vordorf, Wunsiedel, Wunsiedel, Upper Franconia, Kingdom of Bavaria, German Confederation | 9 January 1865 | Cerro Gordo County, Iowa, United States | 28 February 1930 |
| Andreas Barthmann | Grandson | German Empire | 19 November 1874 | Deloit, Crawford County, Iowa, United States | 19 March 1954 |
| Sabina Strößenreuther | Daughter-in-law | Vordorf, Vordorf, Wunsiedel, Upper Main, Kingdom of Bavaria, German Confederation | 23 April 1834 | Wall Lake, Sac County, Iowa, United States | 7 July 1897 |
| Henry Frederick Harder | Grandson-in-law | German Confederation | 14 June 1852 | Cerro Gordo County, Iowa, United States | 9 March 1926 |
| K. Barbara Müller | Granddaughter-in-law | German Confederation | November 1853 | Carnarvon, Sac County, Iowa, United States | 11 March 1940 |
| Emelia S. Olson | Granddaughter-in-law | Red Wing, Goodhue County, Minnesota, United States | abt 1873 | Amery, Polk County, Wisconsin, United States | 11 July 1953 |
| Laura E. Patchin | Granddaughter-in-law | Deloit, Crawford County, Iowa, United States | October 1877 | | 1946 |