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Son of Abraham Koch; Mina Koch (Rosenstein) and Mina Kronstein Brother of Johanna Janka Lustig; Emma Auslander (Koch); Ezechiel Bernhard Koch; Alexander Koch; Michael Koch and 12 others; Antonia Koch; Aron Koch; David Koch; Helene Löwy; Julie Weisz; Bernat Koch; Rosalie Koch; Elle Koch; Salamon Koch; Hindl Koch; Samu Koch and Samuel Koch « less