George Yuri Rainich (1886-1968). Of Russian origin.
He studied mathematics at universities in Odessa, Göttingen, and
Munich, taking his final exam at the University of Kazan in 1913.
He then taught at Kazan and Odessa until 1922, when he came to the
United States of America. He was a Johnston Scholar at Johns
Hopkins University from 1923-1926 and then Professor of Mathematics
at the University of Michigan in Ann Arbor, U.S.A.