__
                                            |  
                       _Robert LINCOLN _____|
                      |                     |
                      |                     |__
                      |                        
 _Robert LINCOLN _____|
| (1496 - 1543)       |
|                     |                      __
|                     |                     |  
|                     |_____________________|
|                                           |
|                                           |__
|                                              
|
|--Robert LINCOLN 
|  (1525 - 1556)
|                                            __
|                                           |  
|                      _____________________|
|                     |                     |
|                     |                     |__
|                     |                        
|_Joan COWPER ________|
  (1503 - 1557)       |
                      |                      __
                      |                     |  
                      |_____________________|
                                            |
                                            |__