_____________________
                                            |                     
                       _____________________|
                      |                     |
                      |                     |_____________________
                      |                                           
 _William LEWIS ______|
| (1735 - ....)       |
|                     |                      _____________________
|                     |                     |                     
|                     |_____________________|
|                                           |
|                                           |_____________________
|                                                                 
|
|--Meriwether LEWIS 
|  (1774 - ....)
|                                            _____________________
|                                           |                     
|                      _Thomas MERIWETHER __|
|                     | (1714 - 1756) m 1735|
|                     |                     |_____________________
|                     |                                           
|_Lucy MERIWETHER ____|
  (1751 - 1837)       |
                      |                      _Francis THORNTON Jr_+
                      |                     | (1681 - 1703)       
                      |_Elizabeth THORNTON _|
                        (.... - 1756) m 1735|
                                            |_Mary TALIAFERRO ____