Hermine Braunsteiner Ryan (July 16, 1919 – April 19, 1999) was a German SS Helferin and female camp guard at Ravensbrück and Majdanek concentration camps, and the first Nazi war criminal to be extradited from the United States, to face trial in the then West Germany. Braunsteiner was known to prisoners of Majdanek concentration camp as the "Stomping Mare" and was said to have whipped women to death, thrown children by their hair onto trucks that took them to their deaths in gas chambers, hanged young female prisoners and stomped an old woman to death with her jackboots.