__
                                                     |  
                        _James Madison DUKE _________|
                       | (1809 - 1892)               |
                       |                             |__
                       |                                
 _William Adison DUKE _|
| (1838 - 1899)        |
|                      |                              __
|                      |                             |  
|                      |_Elizabeth Lavinia JENNINGS _|
|                        (1812 - 1885)               |
|                                                    |__
|                                                       
|
|--Roland Treva DUKE 
|  (1879 - 1935)
|                                                     __
|                                                    |  
|                       _____________________________|
|                      |                             |
|                      |                             |__
|                      |                                
|_Mary BROOME _________|
  (1851 - 1922)        |
                       |                              __
                       |                             |  
                       |_____________________________|
                                                     |
                                                     |__