Simon Moritz von Bethmann (1768-1826) German banker; Moritz August (1795-1877 ); Johann Philipp (1791-1812);The most notable of the Bethmanns was Simon Moritz von Bethmann (1768–1826): banker, diplomat, politician, philanthropist and patron of the arts. His sister Maria Elisabeth was the mother of Marie d'Agoult and the grandmother of Cosima Wagner; his sister Susanne Elisabeth, the great-grandmother of Theobald von Bethmann-Hollweg.|