Based on y-DNA results and generally accepted genealogical records, the following ancestors of our project members within each group are related to the other ancestors in the group, i.e., share a common ancestor. Please note that the information provided is not an endorsement, nor a disclaimer, of the genealogical record, but is merely to identify the given ancestor.
| Group 1: I-M223 Ulster | (I-BY194140) | |||
| Paternal Ancestor Name | Birth | Death | ||
| William Roulston/Rolstone | c1708? | possibly Boston, MA | 1767 | Augusta (Rockingham), VA |
| Robert Ralston | 1725 | possibly Scotland | 1789 | Anderson, SC |
| David Ralston | 1741 | NIR (Poss Tyrone) | 1831 | Davidson, TN |
| James Roulston | 1746 | Donegal, IE | 1852 | Donegal, IE |
| James Rolleston | c1750 | Tyrone, NIR | Tyrone, NIR | |
| John? Ralston | 1751 | Unknown | c1802 | Tyrone, NIR |
| Joseph Ralston, Sr. | 1760 | NIR (Poss. Antrim) | 1834 | Parke, IN |
| Joseph David Ralston | 1760 | IE | 1812 | Lancaster, PA |
| James Rolston | 1761 | Unknown | 1847 | Fermanagh, NIR |
| Samuel Roulston | 1765 | Donegal, IE | 1825 | Donegal, IE |
| William Ralston | 1779 | IE | 1850 | Washington, PA |
| Robert Roulston | 1786 | Donegal, IE | 1860 | Hants, Nova Scotia |
| William Ralston | 1787 | IE | 1872 | Piqua, OH |
| James Roulstone | 1792 | Castlederg, Tyrone, NIR | 1858 | Waldo, ME |
| Basil E. Ralston Sr | 1805 | KY (Poss Greenup) | 1895 | Pike, IL |
| Joseph Ralston | 1808 | IE | 1857 | Scotland |
| David Roulston | 1813 | Donegal, IE | 1906 | Donegal, IE |
| William S Ralston | 1815 | Belfast, Antrim, NIR | 1890 | Grant City, IA |
| Henry McCalvin Rolston | 1822 | Muskingum, OH | 1908 | Hardin, OH |
| Group 2: R-M269 Paisley | (R-BY15421) | |||
| Paternal Ancestor Name | Birth | Death | ||
| Gavin Ralston | 1655 | Paisley, Renfrewshire | c1720 | Paisley, Renfrewshire |
| Gavin Ralston | 1678 | Campbelltown, Argyll | 1733 | |
| Peter Ralston | 1708 | Argyll, Scotland | 1795 | Argyll, Scotland |
| John Ralston | c1749 | Scotland | 1837 | Paisley, Renfrewshire |
| John A. Ralston | 1760 | Argyll, Scotland | 1823 | Beaver, PA |
| John Ralston | 1778 | Paisley, Renfrewshire | ||
| Group 3: R-M269 Armagh |
(R-FT365926) | |||
| Ken Rolston's Armagh Paper | ||||
| Paternal Ancestor Name | Birth | Death | ||
| Robert Ralston | 1757 | Armagh, NIR | 1841 | Armagh, NIR |
| Robert P Ralston | 1780 | Ireland | 1862 | Morrow, OH |
| Samuel Ralston | 1781 | IE | 1835 | Lancaster, PA |
| David Rollston | 1785 | Armagh, NIR | 1877 | Armagh, NIR |
| Group 4: R-M269 Scotland Ralton | (R-FTA49702) | |||
| Paternal Ancestor Name | Birth | Death | ||
| William Ralton | 1722 | East Dunbartonshire, Scotland | unknown | |
| Thomas Raltoun | c1589 | Glasgow, Scotland | Glasgow, Scotland | |
| James Rolston | c1794 | IE | 1866 | Armagh, NIR |
| Robert Downey Ralston | 1782 | Paisley, Renfrewshire | unknown | |