______________________
                                                |                      
                       _________________________|
                      |                         |
                      |                         |______________________
                      |                                                
 _John Y. DERRICK ____|
| (1835 - 1861) m 1859|
|                     |                          ______________________
|                     |                         |                      
|                     |_________________________|
|                                               |
|                                               |______________________
|                                                                      
|
|--S. W. DERRICK 
|  (1861 - 1862)
|                                                _Joseph B. ALLISON ___
|                                               | (1778 - 1845) m 1805 
|                      _Richard Booker ALLISON _|
|                     | (1808 - 1883) m 1833    |
|                     |                         |_Catherine LNU _______
|                     |                           (1774 - 1851) m 1805 
|_Lavina C. ALLISON __|
  (1839 - 1918) m 1859|
                      |                          _William Tandy COBBS _+
                      |                         | (1783 - 1870) m 1819 
                      |_Sarah Wash COBBS _______|
                        (1814 - 1887) m 1833    |
                                                |_Mary KEY ____________+
                                                  (1785 - 1846) m 1819