upper class jews were from germany - rothschilds, loebs, oppenheimer, kuhns, guggenheims etc

https://www.vanityfair.com/style/2009/01/madoff200901

“There were two kinds of people. There were ‘people we visit’ and ‘people we wouldn’t visit,’” Stephen Birmingham wrote 42 years ago in Our Crowd, a history of the German Jews of New York. The term “our crowd” immediately became a code of the culture and was used commonly in conversation. “They are very our crowd,” one might say. Or, “They aspire to be our crowd.” Birmingham eloquently depicted a world of what he called “perpetual reassurance,” the upper-class world of Loebs and Lehmans, Guggenheims and Sachses. Our Crowd became, for many, a guidebook for the emerging Jewish middle class’s cultural aspirations. The book was an immediate popular success, but it turned into something more profound, a template for achievement that was discussed in many Jewish homes all across America. Our mothers underlined significant stories, such as the one about August Belmont’s name change and the one about a member of the Lehman family who took a psychology test and was startled to learn that she was an anti-Semite. Our crowd did not wear flashy clothes or elaborate jewelry. “No stones” was a mantra. Birmingham identified the core values of the new society, a group that prided itself on a lack of showiness.

(http://www.autoadmit.com/thread.php?thread_id=3764374&forum_id=2#34444345)