Claim: In 1852, Joseph Newark (1799–1881) moved to San Francisco and partnered with Joseph Brandenstein to open a dry goods store; he later relocated to Los Angeles and established Congregation B'nai B'rith, the city's oldest Orthodox synagogue.
Evidence: Joseph Newmark (1799–1881) was a Prussian-born immigrant to the United States who co-founded B'nai Jeshurun in New York City and Congregation B'nai B'rith, now known as the Wilshire Boulevard Temple, the oldest synagogue in Los Angeles. He moved to San Francisco in 1852 where he briefly partnered with Joseph Brandenstein and established a dry goods store before moving to Los Angeles in September 1854. He established Congregation B'nai B'rith, the oldest synagogue in Los Angeles now known as the Wilshire Boulevard Temple, which began as an Orthodox synagogue. 
1799
Neumark, West Prussia (now Poland) 1881 (aged 81–82)
Los Angeles, California He moved to San Francisco in 1852 where he briefly partnered with Joseph Brandenstein and established a dry goods store before moving to Los Angeles in September 1854. He established Congregation B'nai B'rith, the oldest synagogue in Los Angeles now known as the Wilshire Boulevard Temple, which began as an Orthodox synagogue.