Fredericka Mandelbaum
American fence and gang boss of German origin · United States · On the map · Founders · Lived 1825 to 1894 · aged 68
Fredericka "Marm" Mandelbaum operated as a criminal fence to many of the street gangs and criminals of New York's underworld, handling between $1-5 million in stolen goods between 1862 and 1884.
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A typical day, 30 days to 23 June 2026
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About this person
Like her principal rival John D. Grady and the Grady Gang, she also became a matriarch to the criminal elements of the city and was involved in financing and organizing numerous burglaries and other criminal operations throughout the post-American Civil War era. With George Leonidas Leslie, she was involved in the 1869 Ocean National Bank robbery and the 1878 Manhattan Savings Institution robbery.
