_Georg MAYER ________
                                               | (.... - 1819)       
                        _Johannes Jacob MAYER _|
                       | (1797 - ....) m 1819  |
                       |                       |_Magdalena WAGNER ___
                       |                                             
 _John F MYERS ________|
| (1823 - 1913) m 1845 |
|                      |                        _Johann Jacob KOCH __
|                      |                       | (1773 - 1860)       
|                      |_Salome Sarah KOCH ____|
|                        (1803 - 1870) m 1819  |
|                                              |_Catherina MOHR _____+
|                                                (1773 - 1851)       
|
|--Elizabeth MYERS 
|  (1865 - 1865)
|                                               _____________________
|                                              |                     
|                       _John ROHLER __________|
|                      | (1802 - 1866)         |
|                      |                       |_____________________
|                      |                                             
|_Marie Louise ROHLER _|
  (1823 - 1892) m 1845 |
                       |                        _____________________
                       |                       |                     
                       |_Sarah LNU ____________|
                         (1789 - 1851)         |
                                               |_____________________