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Son of Paweł Piotr Herkowski and Józefina Gertruda Gromowska Brother of Józefina Hirkowska; Antoni Herkowski and Marianna Herkowska Half brother of Marianna Anna Gromowska; Katarzyna Elżbieta Cysewska; Marianna Gromowska; Tomasz Gromowski; Jan Gromowski and 1 other; and Barbara Gromowska « less