_Thomas MARSHALL _____
                                                          | (1730 - 1802) m 1754 
                                   _John Curtis MARSHALL _|
                                  | (1755 - 1835) m 1783  |
                                  |                       |_Mary Randolph KEITH _+
                                  |                         (1737 - 1809) m 1754 
 _Jaquelin Ambler MARSHALL _______|
| (1787 - 1852) m 1819            |
|                                 |                        ______________________
|                                 |                       |                      
|                                 |_Mary Willis AMBLER ___|
|                                   (1766 - 1831) m 1783  |
|                                                         |______________________
|                                                                                
|
|--Eliza Clarkson MARSHALL 
|  (1827 - 1868)
|                                                          ______________________
|                                                         |                      
|                                  _______________________|
|                                 |                       |
|                                 |                       |______________________
|                                 |                                              
|_Eliza Letitia Steptoe CLARKSON _|
  (1798 - 1868) m 1819            |
                                  |                        ______________________
                                  |                       |                      
                                  |_______________________|
                                                          |
                                                          |______________________