______________________________
                                                         |                              
                            _____________________________|
                           |                             |
                           |                             |______________________________
                           |                                                            
 _Harold Fowler MCCORMICK _|
| (1872 - 1941) m 1895     |
|                          |                              _Melzer FOWLER _______________
|                          |                             | (1803 - 1835)                
|                          |_Nancy FOWLER _______________|
|                            (1835 - 1923)               |
|                                                        |_Clarissa SPICER _____________
|                                                          (1805 - 1842)                
|
|--John Rockefeller MCCORMICK 
|  (1897 - 1901)
|                                                         _William Avery ROCKEFELLER Sr_+
|                                                        | (1810 - 1906) m 1837         
|                           _John Davison ROCKEFELLER Sr_|
|                          | (1839 - 1937)               |
|                          |                             |_Eliza DAVISON _______________+
|                          |                               (1813 - 1889) m 1837         
|_Edith ROCKEFELLER _______|
  (1872 - 1932) m 1895     |
                           |                              _Harvey Buell SPELMAN ________
                           |                             | (1811 - 1881)                
                           |_Laura Celestia SPELMAN _____|
                             (1839 - 1915)               |
                                                         |_Lucy HENRY __________________
                                                           (1818 - 1897)