I. Y. EYNHORN (ISSAR YOSEF EINHORN) (January 15, 1866-July 10, 1925)
He was born in Kaidan (Kėdainiai), Lithuania, the brother of the Warsaw journalist Arn Eynhorn. He moved to Vilna at age fifteen, and there he studied in a yeshiva and also attended to his secular education. He traveled to France in 1891 and studied agronomy in Montpellier. He was a teacher of natural science in the Alliance school Mikvah-Yisrael in Palestine. He then returned from there to France where he founded—together with L. Papyerin, Dr. Raskin, and Dr. Rokeach—L’écho sioniste. From 1912 he was living in Warsaw. He was on the editorial board of Folks-universitet (People’s university), a contributor to the Yiddish press, and the author of books about botanical and zoological subjects, physics, and chemistry, under the pen name A. Y. Rogodin. He also published textbooks in Hebrew. He died in Warsaw.
Sources: Zalmen Reyzen, Leksikon, vol. 1; Bibliographishe yorbikher fun yivo (Bibliographic yearbooks from YIVO), vol. 1 (1926), pp. 275, 282.