Sigmund Feist

Sigmund Feist (Mainz, 12 June 1865 ''–'' Copenhagen, 23 March 1943) was a German Jewish pedagogue and historical linguist. He was the author of the Germanic substrate hypothesis as well as a number of important works concerning Jewish ethnic and racial identity. Feist served as the director of the Jewish Reichenheim Orphanage in Berlin from 1906 to 1935. In 1907 he became a member of the Gesellschaft der Freunde society.

Feist emigrated to Denmark in 1939 where he died four years later. Provided by Wikipedia