Ilya Prigogine
Viscount Ilya Romanovich Prigogine was a Belgian physical chemist and Nobel Laureate noted for his work on dissipative structures, complex systems, and irreversibility.
Prigogine was born in Moscow a few months before the Russian Revolution of 1917, into a Jewish family. His father, Roman Prigogine, was a chemical engineer at the Imperial Moscow Technical School his mother, Yulia Vikhman, was a pianist. Because the family was critical of the new Soviet system, they left Russia in 1921. They first went to Germany and in 1929, to Belgium, where Prigogine received Belgian nationality in 1949. His brother Alexandre became an ornithologist.
Source: Wikipedia