Jonathan, Eli and Ellis were probably the sons of Plummer and Nancy Ann (Pettit) Pettit.

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From http://ftp.rootsweb.com/pub/usgenweb/oh/vinton/land/vint-p-s.txt

VINTON COUNTY OHIO - Bureau of Land Management Database
OHIO RIVER SURVEY
CHILLICOTHE

                  sec/twp/range     doc#       date
PEDIT, ELI        17 / 10N / 18W   #16244   1849/09/01
PETTIT, DAVID     27 / 12N / 17W   #9604    1841/06/25
PETTIT, DAVID     22 / 12N / 17W   #9603    1841/06/25
PETTIT, ELLIS      6 / 10N / 18W   #17462   1852/07/01
PETTIT, JONATHAN  12 / 10N / 19W   #17314   1852/07/01
PETTIT, JONATHAN  13 / 10N / 19W   #17318   1852/07/01