_John COBBS _________+
                                               | (1691 - 1775)       
                       _Samuel COBBS __________|
                      | (1750 - 1801) m 1768   |
                      |                        |_____________________
                      |                                              
 _John COBBS _________|
| (1773 - ....)       |
|                     |                         _Thomas MUMFORD _____
|                     |                        | (1719 - 1785) m 1744
|                     |_Elizabeth Ann MUMFORD _|
|                       (1747 - ....) m 1768   |
|                                              |_Sarah BOOKER _______+
|                                                (1722 - 1816) m 1744
|
|--Mary King COBBS 
|  (.... - 1829)
|                                               _William GRAVES _____+
|                                              | (1725 - 1776) m 1750
|                      _King GRAVES ___________|
|                     | (1750 - 1791) m 1782   |
|                     |                        |_Sarah COX __________+
|                     |                          (1732 - 1791) m 1750
|_Frances GRAVES _____|
  (1782 - 1857)       |
                      |                         _____________________
                      |                        |                     
                      |_Mary GILL _____________|
                        (.... - 1807) m 1782   |
                                               |_____________________