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Fredericka Mandelbaum

Fredericka "Marm" Mandelbaum (1818 – February 1894) was a New York entrepreneur and operated as a criminal fence to many of the street gangs and criminals of the city's underworld, handling between $1–5 million in stolen goods between 1862 until 1884. Like her principal rival John D. Grady and the Grady Gang, she also became a patron 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.