_John BUCHANAN ______+
                                            | (1732 - 1780)       
                       _John BUCHANAN ______|
                      | (1761 - 1831)       |
                      |                     |_Martha BUCHANAN ____
                      |                       (1730 - 1780)       
 _James BUCHANAN _____|
| (1793 - 1875)       |
|                     |                      _____________________
|                     |                     |                     
|                     |_Nancy WRIGHT _______|
|                       (1771 - 1860)       |
|                                           |_____________________
|                                                                 
|
|--Jane BUCHANAN 
|  (1765 - 1813)
|                                            _John BUCHANAN ______+
|                                           | (1732 - 1780)       
|                      _James BUCHANAN _____|
|                     | (1759 - 1816)       |
|                     |                     |_Martha BUCHANAN ____
|                     |                       (1730 - 1780)       
|_Sarah BUCHANAN _____|
  (1792 - 1863)       |
                      |                      _____________________
                      |                     |                     
                      |_Mary SHANNON _______|
                        (1760 - 1845)       |
                                            |_____________________