The Mendelssohn family are the descendants of Mendel of Dessau. The German Jewish philosopher Moses Mendelssohn and his brother Saul were the first to adopt the surname Mendelssohn. The family includes his grandchildren, the composers Fanny Mendelssohn and Felix.
Mendelssohn's wife, Fromet (Frumet) Guggenheim, was a great-granddaughter of Samuel Oppenheimer.[2]
Mendelssohn & Co. Bank
In 1795 Moses Mendelssohn's eldest son Joseph established the bank Mendelssohn & Co. in Berlin, and his brother Abraham joined the company in 1804. Many members of the family worked for the bank until it was forced to shut down in 1938. In 2004 relatives of the banker Paul von Mendelssohn-Bartholdy (1875–1935), led by his great-nephew Julius H. Schoeps (born 1942), tried to reclaim paintings once owned by him and later sold in the 1940s by his widow, in breach of his will.[3]
Benjamin (Georg) Mendelssohn (1794–1874), geographer
Alexander Mendelssohn (1798–1871), banker, married Marianne Seeligmann (1799–1880)
Marie Mendelssohn (1822–1891), married Robert Warschauer (1816–1884), banker
Anna Warschauer (1841–1866), married Ludwig Passini (1832–1903), painter
Marie Warschauer (1855–1906), married Ernst von Mendelssohn-Bartholdy (1846–1909) see below (A)
Margarete Mendelssohn (1823–1890), married Otto Georg Oppenheim (1817–1909), jurist
Hugo Oppenheim (1847–1921), banker, married Anna Oppenheim (1849–1931)
Else Oppenheim (1873–1945), married Josef Block (1863–1943), painter
Anna Luise Block (1896–1982), publicist; married: (ii) Heinrich Hauser [de] (1901–1955), writer; (iii) Alfred Winslow Jones (1900–1989), hedge fund pioneer
Robert Hugo Oppenheim (1882–1956), banker married (i) Charlotte Simon; (ii) Ehrentraut Margaret Von Ilberg; 4 children Hugo Oppenheim, Alexander Oppenheim, Imogene Oppenheim, Roberta Marielouise Oppenheim