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 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.She was sentenced to life imprisonment by the District Court of Düsseldorf on April 30, 1981 but released on health grounds in 1996 before her death three years later.