_____________________
                                            |                     
                       _____________________|
                      |                     |
                      |                     |_____________________
                      |                                           
 _Frederick ST JOHN __|
| (1734 - 1787) m 1757|
|                     |                      _____________________
|                     |                     |                     
|                     |_____________________|
|                                           |
|                                           |_____________________
|                                                                 
|
|--Henriette ST JOHN 
|  (1762 - ....)
|                                            _Charles SPENCER ____+
|                                           | (1675 - 1722) m 1700
|                      _Charles SPENCER ____|
|                     | (1706 - 1758) m 1732|
|                     |                     |_Anne CHURCHILL _____+
|                     |                       (1682 - 1716) m 1700
|_Diana SPENCER ______|
  (1733 - 1808) m 1757|
                      |                      _____________________
                      |                     |                     
                      |_Elizabeth TREVOR ___|
                        (1715 - 1761) m 1732|
                                            |_____________________