_____________________
                                                |                     
                           _____________________|
                          |                     |
                          |                     |_____________________
                          |                                           
 _James FORBES-ROBERTSON _|
| (1828 - ....) m 1866    |
|                         |                      _____________________
|                         |                     |                     
|                         |_____________________|
|                                               |
|                                               |_____________________
|                                                                     
|
|--Gordon FORBES-ROBERTSON 
|  (1862 - 1943)
|                                                _Benjamin COBB ______+
|                                               | (1753 - 1835) m 1783
|                          _Thomas COBB ________|
|                         | (1796 - 1892) m 1836|
|                         |                     |_Jane SMITH _________+
|                         |                       (1767 - 1799) m 1783
|_Harriet F. COBB ________|
  (1838 - ....) m 1866    |
                          |                      _____________________
                          |                     |                     
                          |_Elizabeth GREEN ____|
                            (1801 - 1881) m 1836|
                                                |_____________________