Otto Alexander von Stackelberg 1812-1887 (1812–1887) Parents Peter Gustaf, Friherre Stackelberg Magdalena, Friherrinnan von Ungern-Sternberg Children Magnus Peter Johann Stackelberg Siblings Magdalene Wilhelmine Charlotte Freein von Stackelberg Peter Ludwig von Stackelberg Alexandrine Louise, Friherrinnan Stackelberg Carl Otto von Stackelberg