Sergey Degayev
Sergey Petrovich Degayev (also spelled Degaev; Russian: Серге́й Петрович Дегаев; 1857 in Moscow – 1921 in Bryn Mawr, Pennsylvania) was a Russian revolutionary terrorist, Okhrana agent, and the murderer of inspector of secret police Georgy Sudeykin. After emigrating to the United States, Degayev took the name Alexander Pell and became a prominent American mathematician, the founder of school of Engineering at the University of South Dakota. The Dr. Alexander Pell scholarship is named in his honor.