Family
Franz August was the son of Reichsfreiherr (baron) Friedrich Schenk von Stauffenberg (born October 23, 1806, in Wetzlar; died May 2, 1874, in Rißtissen) and his wife, Reichsgräfin Karoline Klementine Butler von Clonebough, (born Haimhausen, January 31, 1812, in Ansbach; died November 6, 1879, in Lindau). Franz August's uncle, Franz Ludwig Schenk Freiherr von Stauffenberg (1801–1881, from 1874 Graf), was the great-grandfather of Claus and Berthold Schenk Grafen von Stauffenberg, who were executed after their assassination attempt on Adolf Hitler.
Stauffenberg lived mainly in Rißtissen (today Ehingen, in Baden-Württemberg), with additional properties in Wilflingen (Langenenslingen) and Geislingen (Zollernalbkreis). On August 25, 1860, he married Reichsgräfin Ida Therese von Geldern-Egmont (born October 16, 1837 in Schloss Thurnstein; died March 27, 1887 in Pallanza). They had ten children, five of whom died in infancy. His tenth child, Franz Schenk von Stauffenberg, was the only son to survive and inherited his estate.
Wilhelmine A. Therese Johanna Maria Schenkin von Stauffenberg (* June 24, 1861 in Augsburg; † March 10, 1876 in Menton).
Friedrich Adam Maria Sebastian Vinzenz Schenk Freiherr von Stauffenberg (* January 20, 1863 in Augsburg; † January 30, 1863 in Augsburg).
Elisabeth Klementine Gabriele Maria Schenk Freiherrin von Stauffenberg (* February 15, 1864 in Augsburg; † April 20, 1939 in Ulm): married Hugo Freiherr von Linden on July 3, 1893 in Rißtissen.
Walter Ludwig Friedrich Gotthold Agatha Maria Schenk Freiherr von Stauffenberg (* February 21, 1865 in Augsburg; † September 30, 1865 in Augsburg).
Olga Gabriele Schenk Freiherrin von Stauffenberg (* September 11, 1866; † March 23, 1953 in Wiesenfelde): married Friedrich Graf von Otting und Fünfstetten on May 6th, 1902 in Rißtissen, and was lady-in-waiting (Hofdame) to Duchess Margarete Sophie, wife of Herzog (duke) Albrecht von Württemberg. The couple had three sons: Maximilian, Franz and Ludwig Grafen von Ottingen und Fünfstetten.
Johanna Friederike Klementine Marie Freiherrin von Stauffenberg (* February 16, 1868 in Rißtissen; † July 19, 1868 in Rißtissen).
Gabriele Philippine Marie Barbara Schenk Freiherrin von Stauffenberg (* December 4, 1869 in Rißtissen; † October 18, 1956 in Munich): married Gustav Freiherr von Habermann on April 8th, 1896 in Munich.
Friedrich W. Schenk Freiherr von Stauffenberg (* September 2, 1873 in Rißtissen; † October 25, 1873 in Rißtissen).
Unnamed Daughter (* July 18, 1874 in Rißtissen; † Juli 19, 1874 in Rißtissen).
Franz Wilhelm Karl Maria Gabriel Schenk Freiherr von Stauffenberg (* August 14, 1878 in Rißtissen; † November 9, 1950 in Riedlingen): married Huberta Gräfin Wolff-Metternich on May 27th, 1903 in Bonn.