Jonathan Fitz Randolph born 1759 (some family trees claim Virginia as birth place and at least two or three of his children were born there according to the 1850 Federal Census of Summit County, Ohio) died 20 February 1847, buried in Bath Center, Summit County, Ohio cemetery along with his wife Jane (possibly Cutler) and several other members of their extended family (including Resin Randolph who was a local postmaster in Summit County, the son of Jonas and Mary (Bevington) Fitz Randolph.
Still there is not direct proof of relationships between this Jonathan and Jonas, William, Elizabeth, Ruth, and Rachel Randolph the siblings who all married in Columbiana County, Ohio between 1815 and 1818, then most of whom (Jonas, William and Rachel (married Henry Bevington - brother of Jonas's wife Mary) moved to Chippewa Township, Wayne County, Ohio by 1819 then to Bath (Jonas and family) or Portage Townships (William's family) by 1834 (when Henry is born, and by 1836 the children are listed within the county school system) which became part of Summit County in 1840.
But, there is a lot of source documentation that proves which of the Fitz Randolph descent lines they were not related directly from. These include the Jonathan Fitz Randolph's from the lines shown below
There are no Jonathan's named in the three or four generations of Fitz Randolphs from the sons Nathaniel (2nd son), John (4th son) or Benjamin (7th son) lines descended from Edward and Elizabeth Fitz Randolph. In the 1820's there is a Jonathan, son of Richard Fitz Randolph (descended from Nathaniel) born in Columbiana County, Ohio.
Thomas, the sixth son of Edward and Elizabeth (BLossom) Fitz Randoph) married Elizabeth Manning:
Thomas (1659-1745)-David (1690-1773)- Barzilla (1762 -) -Jonathan 1787
Thomas (1659-1745)-David (1690-1773) -James (1712-1774) -James (1748-) -Jonathan 1779-
Thomas (1659-1745)-David (1690-1773)- Molleson (1716-1795) Nehemiah - ( ) Jonathan b. 1775
Thomas (1659-1745)-David (1690-1773)- Molleson (1716-1795) Nehemiah ( ) Micah ( ) - Jonathan 1813 or 1824 NY
Thomas (1659-1745)-Jonathan 1692-1783 Samuel 1738-1825 Jonathan 1775-1858.
That leaves Joseph, the fifth son who married Johanna Conger and whose sons Joseph and Moses don't have descendants named Jonathan within the generation that would have been a parent to the Jonathan in Summit County, Ohio.
That leaves Joseph and Johanna's sons Jonathan (1702-1766) and Isaac (1716-1810). Isaac, who may have had two sons named Daniel and Edward who were assigned to administer his estate by the New Jersey probate court does not seem to have a Jonathan in his descent. Of the son remaining of Joseph and Johanna, Jonathan (who married Margaret Manning in 1724) seems most likely to have been the ancestor of Jonathan (1759-1847) via one of two sons (James (1725-?) or Jonathan (1732-?); his third son Thomas's (1729-1792?) family is known and there are no Jonathan's born into his family in the critical generation.
James and Jonathan, sons of Jonathan and Margaret are very difficult to trace, both disappearing from the Middlesex County, New Jersey documentation sometime prior to their father's death in 1766 (actually the date of the probate record). There is some research (available on-line) in the H.C. Burleigh Papers Randolph Genealogy Fonds which contains a letter from Howard S. F. Stelle co-editor of Christian and Stelle's "Fitz Randolph Genealogy"and dated 30 August 1951 suggesting that James may have gone to upper New York state.
Here is a possible scenario: Jonathan's (1702-1766) oldest sister Hannah married Andrew Drake. Their eldest daughter Susanna married Isaac Smalley in Loudoun County, Virginia in 1743. It may be that Jonathan moved to Loudoun County, Virginia with or after their cousin - James at 18 may have left for New York where there were other cousins, and Jonathan 11 may have accompanied the Smalley's to Virginia. Since the death date of Margaret Manning (Jame's mother for sure) is unknown - it could be likely that she died giving birth to Susannah or one of the children after, either Thomas or Jonathan (since no subsequent children are recorded). There is a record of the Smalley family having representatives in Loudoun County, Virginia but the Fitz Randolph's may only be identified as Randolph's, (there are tax records in and around 1787 that list a number of Randolphs including a Jonathan and Jonas (one and two generations prior to the Summit County Randolph children of the same given names):
Virginia Tax Records 1782-1787
Randall, Jonas 1 Loudoun
Randall, Jonathan 1 Loudoun
Randolph, Thomas 1 Loudoun
Other slightly later Tax records (1790?) record the names again with additional information and other Randolph's named including a John with one stud horse and a William with son Isaac.
At the Loudoun County courthouse is a record of a 1794 lawsuit which was never brought before the court because one Jonathan Randolph could not be found in the county.
Evidence does exist of (Fitz) Randolph families being in Columbiana County, Ohio, including a Jonathan in Elkrun (Elk Run) Township, who may be the same individual as the Jonathan Randels living next door to George Welker who married Jonathan's daughter Elizabeth in 1815 (source: 1820 Federal Census of Elkrun). Also a Richard Fitz Randolph, a descendant of Nathaniel Fitz Randolph the eldest of Edward and Elizabeth (Blossom) Fitz Randolph's children, who had a son Jonathan but born around 1820, long after all of Jonathan and Jane Fitz Randolph's children were married with children of their own.