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Father: Diederich Friedrich Georg Grossmann
Born: 1806, Hannover
Marr: 1836
Died: 1868
Mother: Maria Bremer
Born: 1814, Hannover
Died: 1891
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Father: August Wilhelm Schmelke
Born: 1819
Marr: 1844 
Died: 1881
Mother: Caroline Wilhelmine Schultz
Born: 1825
Died: 1887
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| Johannis Wilhelm Otto Grossmann
Born: 22 OCT 1847 - Hamburg St. Petri
Marr: 1 JUN 1878 - Hamburg
Died: 22 MAR 1907 - Hamburg
Other Spouses:
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| Elisabeth Dorothea Schmelke
Born: 29 AUG 1856 - Hamburg St. Jacobi
Died: 4 MAY 1929 - Hamburg
Other Spouses:
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| 1. Alma Marie Großmann Born: 29 JUL 1886 - Hamburg Marr: 1907 - Gustav Wilhelm Steenbock Died: - | | 2. Johannes August Paul Großmann Born: 4 JUL 1882 - Hamburg Marr: 1923 - Died: - | |
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