Johann Konrad
                            Duncker
                           (1712–57)
                           [F6C]|
                                |
                            Christian = Charlotte
                             Wilhelm  |  Adolphi
                            (1749-83) |
                            [F6C]     |
                                      |
                                      |          (2831.2)
                                      |    (1810)   |
                                     Carl     =   Fanny
                                 (1781-1869)  |    Levy
                                 [F6C]        |   †1869
                                              |
                   ___________________________|_________________________
                  |                           |            |            |
                  |    (1843)                 |            |            |
              Maximilian  =  Charlotte    Alexander     Hermann       Franz
               Wolfgang       Guitcke     (1813–97)    (1817-93)    (1822–88)   
              (1811-86)        †1890     [F6C]|        [F6C]        [F6C]
              [F6C]            [F6C]          |
                                              |
                                            Dora
                                         (1855–1916)
                                         [F6C]