ROSENTHAL, LEON (JUDAH LÖB B. MOSES HA-LEVI):
Russian financier, philanthropist, and communal worker; born in Wilna Nov. 16, 1817; died in Locarno, Switzerland, June 19, 1887. His father was a progressive, scholarly merchant whose house was one of the rallying-points of the Haskalah movement early in the nineteenth century. Young Rosenthal received a liberal education; married very early, according to the custom of those times in Lithuania; and lived several years with his father-in-law, Samuel Joel Neumark, in Brest-Litovsk. He then entered the service of the Günzburg family, and, after becoming their business associate, settled in St. Petersburg about 1850. He later engaged in extensive enterprises on his own account and became one of the leading bankers and financiers in the Russian capital.
Rosenthal remained throughout his busy life an ardent admirer of Hebrew literature and an active worker for the spread of secular knowledge among the Jews of Russia. He corresponded with many of the best-known
- Günzig, Toledot Fabius Miescs. pp. 26-28, Cracow, 1890 (reprint from Oẓar ha-Sifrut, iii.);
- Keneset Yisrael (year-book), iii. 151-153, Warsaw, 1887;
- Ha-Meliẓ, viii., No. 21;
- Ha-Shaḥar, v. 14-15.