Jan Gotlib Bloch

Jan Gotlib "Bogumił" Bloch ( or Блох; July 24, 1836 – January 7, 1902) was a Polish banker and railway financier who devoted his private life to the study of modern industrial warfare. Born Jewish and a convert to Calvinism, he spent considerable effort to opposing the prevalent antisemitic policies of the Tsarist government in Congress Poland, and was sympathetic to the fledgling Zionist movement.

Bloch had studied at the University of Berlin, worked at a Warsaw bank and then moved to St. Petersburg, capital of the Russian Empire (which governed much of the Polish lands at the time). There, he took part in the development of the Russian Railways, both in financing the construction of new railways and in writing research papers on the subject. He founded several banking, credit and insurance companies. In 1877, he was appointed a member of the Russian Finance Ministry's Scientific Committee.

Bloch was married to Emilia Julia Kronenberg H. Koroniec (1845–1921), the granddaughter of Polish banker Samuel Eleazar Kronenberg, daughter of medical doctor Henryk Andrzej Kronenberg and niece of industrialist and Polish nationalist Leopold Stanislaw Kronenberg; the Kronenberg and Bloch families had often been in competition with each other in several 19th-century Polish businesses. Provided by Wikipedia