American merchant and communal worker; born at Wollstein, Prussia, Nov. 6, 1846; son of Henry and Zelda Rosnosky. He went to Boston, Mass., as a boy and engaged in business. He was elected to the Boston common council as a Democrat in 1878, and as an Independent in 1879. He served in the Massachusetts House of Representatives in 1880 and from 1891 to 1894, being the first Jew to be elected to either branch of the legislature. Twice he was a delegate to national Democratic conventions; and he served as a commissioner to the World's Fair. It was largely through his efforts that the Carney (Catholic) Hospital fund of $10,000 was raised.
Rosnosky has been for the last twenty-three years (since 1882) president of Temple Ohabei Shalom, the oldest Hebrew congregation in Boston. He is a member of the Association of Past Presidents of the I. O. B. B.
- Solomon Schindler, Israelites in Boston, iii.