John G. Helmer - Pedigree | FamilyCentral
 15 Jan 1758 - 5 Aug 1837
 27 Dec 1715 - 27 Jun 1783
 1719 - 14 Mar 1765
 5 Feb 1689/90 - 27 Jun 1781
 1694 -
  - 1741
 1663 - 1744
 1617 - 24 Sep 1691
  - 13 Jun 1665
 1638 - 20 Dec 1689
 1633 - 16 Apr 1692