_____________________
                                                   |                     
                       _Peter JARVIS ______________|
                      | (1778 - 1861) m 1810       |
                      |                            |_____________________
                      |                                                  
 _Samuel JARVIS ______|
| (1800 - 1844) m 1830|
|                     |                             _Ambrose COBB _______+
|                     |                            | (1761 - 1824) m 1783
|                     |_Mary Elizabeth Polly COBB _|
|                       (1786 - 1840) m 1810       |
|                                                  |_Rachel BLACK _______+
|                                                    (1765 - 1854) m 1783
|
|--Robert JARVIS 
|  (1835 - ....)
|                                                   _____________________
|                                                  |                     
|                      ____________________________|
|                     |                            |
|                     |                            |_____________________
|                     |                                                  
|_Martha HAYRE _______|
  (1815 - ....) m 1830|
                      |                             _____________________
                      |                            |                     
                      |____________________________|
                                                   |
                                                   |_____________________