_Robert COBB ________+
                                            | (1829 - 1914) m 1855
                       _Claborn COBB _______|
                      | (1867 - 1932) m 1887|
                      |                     |_Mary Jane TUTTLE ___+
                      |                       (1829 - ....) m 1855
 _Robert Boyd COBB ___|
| (1887 - 1964)       |
|                     |                      _____________________
|                     |                     |                     
|                     |_Sarah JARVIS _______|
|                       (1870 - 1942) m 1887|
|                                           |_____________________
|                                                                 
|
|--Sheff COBB 
|  (1910 - 1975)
|                                            _____________________
|                                           |                     
|                      _____________________|
|                     |                     |
|                     |                     |_____________________
|                     |                                           
|_Mary BLEVINS _______|
  (1894 - 1963)       |
                      |                      _____________________
                      |                     |                     
                      |_____________________|
                                            |
                                            |_____________________