The Warburg family is a prominent German and American banking family of German Jewish and originally Venetian Jewish descent, noted for their varied accomplishments in biochemistry, botany, political activism, economics, investment banking, law, physics, classical music, art history, pharmacology, physiology, finance, private equity and philanthropy.
They originated as the Venetian Jewish del Banco family, one of the wealthiest Venetian families in the early 16th century. Due to restrictions limiting Jewish involvement in banking, they moved to Bologna, and thence to Warburg, in Westphalia, in the 16th century, after which they later took their name. The first known ancestor was Simon von Kassel (1500–1566).
The family later established itself in Altona, near Hamburg in the 17th century, after the Thirty Years' War, and it was in Hamburg that M. M. Warburg & Co. was established in 1798, among the oldest still existing investment banks in the world. Other banks created by members of the family include Warburg Pincus and S. G. Warburg & Co., the latter having been acquired in 1995 by UBS.
Siegmund George Warburg was of the Alsterufer lines; the five brothers Abraham (Aby) M., Max M., Paul M., Felix M. and Fritz Moritz Warburg were of the Mittelweg line.
The brothers Moses Marcus Warburg (1763–1830) and Gerson Warburg (1765–1826) founded the M. M. Warburg & Co. banking company in 1798. Moses Warburg's great-great grandson, Siegmund George Warburg, founded the investment bank S. G. Warburg & Co in London in 1946. Siegmund's second cousin, Eric Warburg, founded Warburg Pincus in New York in 1938. Eric Warburg's son Max Warburg Jr. (not to be confused with Eric's father Max Warburg) is currently one of the three partners of M.M.Warburg & Co., Warburg. Max Warburg's elder brother Aby Warburg used family resources to establish the Kulturwissenschaftliche Bibliothek Warburg in Hamburg, since 1934 The Warburg Institute in London. Paul Warburg is most famous as an architect of the US Federal Reserve System, established in 1913. Paul was a member of the first Federal Reserve Board, and its Vice Chairman until his resignation in August 1918.
In 1895, Paul Warburg married Nina Loeb, daughter of Solomon Loeb of Kuhn, Loeb & Co.,having met her at the wedding of brother Felix Warburg, who had married Jacob Schiff's daughter, Frieda. But originally it was founding partner Abraham Kuhn who concentrated the family wealth and cemented business relations with newly immigrated distant cousin Solomon Loeb by his marriage to Kuhn's sister. Shortly thereafter the two became full partners in their newly established New York banking investment firm of, Kuhn, Loeb & Co.Naomi Wiener Cohen, Jacob H. Schiff: a study in American Jewish leadership In more recent times Schiff's great-great grandson Drew previously was married to Al Gore's daughter, Karenna, who has risen in place at the Union Theological Seminary. UTS shares a partnership with the Jewish Theological Seminary, each located in NYC in Manhattan, where the JTS has historically been associated as well, with the Jewish Museum.
Having ties to America and Germany like many other prominent Jewish financial families, the Warburgs abroad maintained close ties to their Jewish roots. The Felix M. Warburg House in New York City is now the Jewish Museum, and Kfar Warburg in Israel is named for him. Otto Warburg, a cousin of the German-based Warburgs was a wealthy botanist who was elected head of the World Zionist Organization in 1911. Felix's brother, Paul Warburg was one of the original founders of the board of the U.S. Federal Reserve System, a collection of 12 regional Reserve Banks headed by a Board of Governors which regulates and oversees private commercial banks. As one of the most prominent bankers of his time, his brother Max Warburg attended the Paris Peace Conference of 1919 at Versailles, as part of the German delegation.
During the Weimar Republic, Max Warburg served on the board ('Generalrat') of the Reichsbank from 1924 to 1933, under two successive chairmen, Hjalmar Schacht, (until 1930), and Hans Luther (1930–1933); until 1934, he was also on the Board of the Bankenverband. Max Warburg emigrated in 1938. In the 1920s and 1930s, until the end of the Weimar Republic in 1933, Max Warburg also served on several Supervisory Boards ("Aufsichtsrat") in industry, notably HAPAG, Blohm &Voss, Beiersdorf, and, until his resignation in 1932, as a member of the Supervisory Board ("Aufsichtsrat") of the German conglomerate/ chemical firm known as IG Farben (Interessen Gemeinschaft Farben). His brother Paul Warburg, who died in January 1932a year before Hitler was elected Chancelloralso served on numerous Supervisory Boards ("Aufsichtsrat") including allegedly that of an I.G. Farben wholly owned US subsidiary.
Most members of the German Warburg family had fled to the United States or Great Britain by the end of 1938. However, Max Warburg's brother, Fritz Warburg, who was preparing his exile in Sweden, was arrested by the Gestapo in Hamburg in early November 1938 and spent some months in prison before he could leave for Stockholm in May 1939. His daughter Eva came to organize the emigration for 500 German Jewish children from Germany and Austria to Sweden in 1938 and 1939.Rudberg, Pontus, The Swedish Jews and the Victims of Nazi Terror, Uppsala 2015, pp. 48-49. Also, three cousins, mother, Gerta and daughters Betty and Helene Julie (Burchard) Warburg, stayed in Altona. Gerta and Betty were murdered in the Sobibor extermination camp in 1940 and Helena Julie in Auschwitz in 1942. A life size portrait of Helene Julie by the Norwegian artist Edvard Munch today hangs in the Kunsthaus in Zurich (The Lady in White).Ron Chernow, The Warburgs (Vantage: 1993) Eric Warburg, son of Max Warburg, returned to Germany as an officer (colonel) in the American Air Force and was influential in restoring German-Jewish relations and rebuilding Germany's economic ties after the Second World War through his international business associations. Eric's son, also called Max, is currently a partner in M.M. Warburg & Co. in Hamburg.
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