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 _David CALVERT ______________|
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|--Vicki CALVERT 
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|                              _Burrell H. JOHNSTON __|
|                             | (1882 - ....) m 1921  |
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|_Marjorie Kathleen JOHNSTON _|
  (1924 - 1970)               |
                              |                                                  _Nicholas Lafayette MARR _
                              |                                                 | (1824 - 1854) m 1847     
                              |                        _Nicholas Rowan MARR ____|_Sarah Agatha PERKINS ____
                              |                       | (1850 - 1895) m 1890                               
                              |_Virginia Butler MARR _|
                                (1892 - 1960) m 1921  |
                                                      |                          _James M. BUTLER _________+
                                                      |                         | (1813 - 1891) m 1854     
                                                      |_Virgie Americus BUTLER _|_Amanda BISHOP ___________
                                                        (1862 - 1944) m 1890      (1828 - 1900)