_Abraham Samuel WARBURG _+
                                                      | (1798 - 1856)           
                         _Moritz Moses WARBURG _______|
                        | (1838 - 1910)               |
                        |                             |_Sara WARBURG ___________+
                        |                                                       
 _Felix Moritz WARBURG _|
| (1871 - 1937)         |
|                       |                              _________________________
|                       |                             |                         
|                       |_Charlotte Esther OPPENHEIM _|
|                         (1842 - 1921)               |
|                                                     |_________________________
|                                                                               
|
|--Gerald Felix WARBURG 
|  (1901 - 1971)
|                                                      _________________________
|                                                     |                         
|                        _Jacob Henry SCHIFF _________|
|                       | (1847 - 1920)               |
|                       |                             |_________________________
|                       |                                                       
|_Frieda SCHIFF ________|
  (1876 - 1958)         |
                        |                              _Solomon LOEB ___________
                        |                             | (1828 - 1903)           
                        |_Therese LOEB _______________|
                          (1854 - 1933)               |
                                                      |_Fannie KUHN ____________
                                                        (.... - 1856)