Rahel Wollf-Marx (1882-1942) was the daughter of George Marx (1843-1927) and Gertrud Marx-Simon (1851-1916). She was born, in Königsberg, East Prussia, Germany (now Kaliningrad, Russia). George and Gertrud had married in 1871 and had twelve children: Ketty Marx (1872-1893), Hermann Marx (1873-1959), Helene Felsenstein-Marx (1874-1963), Benjamin Marx (1876-1877), Alexander Marx (1878-1953), Josef Marx (1880-1937), Rahel Wolff-Marx (1882-1942), Sarah Lewin-Marx (1883-1966), Moses Marx (1885-1973), Rosa Brünn-Marx (1887-1984), Esther Czaczkes-Marx (1889-1973) and Hannah Felsenstein-Marx (1897-1988).
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