________________________
                                                      |                        
                            _Hezekiah Franklin ERWIN _|
                           | (1811 - 1859) m 1852     |
                           |                          |________________________
                           |                                                   
 _Howell Frank Cobb ERWIN _|
| (1855 - 1879) m 1878     |
|                          |                           _John Addison COBB _____+
|                          |                          | (1783 - 1855) m 1812   
|                          |_Mary Willis COBB ________|
|                            (1828 - 1899) m 1852     |
|                                                     |_Sarah Robinson ROOTES _+
|                                                       (1792 - 1866) m 1812   
|
|--Howell ERWIN 
|  (1879 - ....)
|                                                      ________________________
|                                                     |                        
|                           _B. Frank THORPE _________|
|                          | (1820 - ....) m 1850     |
|                          |                          |________________________
|                          |                                                   
|_Ophelia THORPE __________|
  (1852 - ....) m 1878     |
                           |                           ________________________
                           |                          |                        
                           |_Martha A. LNU ___________|
                             (1826 - ....) m 1850     |
                                                      |________________________