| | Birth place | Death place | Father | Mother | Joined with |
|---|
| William Adair (1820-1891) | Kingsey, Drummun, Quebec, Canada | Upton, Worcester County, Massachusetts, United States | John Adair (1795-) | Joanna Conant (1798-) | Mary Britton (1827-1907) |
| William Adair (c1718-1812) | County Antrim, Northern Ireland, United Kingdom | Mercer County, Kentucky, United States | Thomas Adair (c1680-c1740) | Margaret Marie Henart (c1680-c1750) | Mary Moore (1729-1797) |
| William Adair (1852-) | Renfrewshire, Scotland, United States | | David Adair (1812-1881) | Jessie Gibb (1811-) | Margaret Smith (1852-) |
| William Adair (1898-) | Port Glasgow, Renfrewshire, Scotland, United Kingdom | | David Adair (1874-) | Jane Inglis Bowman (1878-1954) | Elizabeth Oliver (1904-1970) |
| William Adair (1754-1844) | | Newton Abbott, Devon, England, United Kingdom | William Robert Adair (1728-1798) | Anne McAuley (1735-1798) | Camilla Shafto (1756-1827) |
| William Adair (1418-1485) | Kilhilt Tower, Portpatrick, Wigtownshire, Scotland | | Niegel Adair (1392-1475) | Marrietta Vans (1395-1476) | Miss Vaux (1420-) |
| William Adair (1500-1575) | Kilhilt Tower, Portpatrick, Wigtownshire, Scotland, United Kingdom | Kilhilt Tower, Portpatrick, Wigtownshire, Scotland, United Kingdom | Ninian Adair (1470-1525) | Katherine Agnew (1469-1575) | Helen Kennedy (1507-1572) |
| William Adair (1795-) | North Carolina, United States | High Shoals, Rutherford County, North Carolina, United States | William Adair (1764-1808) | Catherine Janes (1768-1849) | Anney Arminda Tyler (1791-) |
| William Adair (1764-1808) | York County, South Carolina, United States | Rutherford County, North Carolina, United States | Robert Adair (1709-1783) | Elizabeth Clark Hobson (1715-1763) | Catherine Janes (1768-1849) |
| William Adair (1755-) | Kilwinning, North Ayrshire, Scotland, United Kingdom | Scotland, United Kingdom | John Adair (1730-) | Elizabeth Stewart (1825-) | Margaret Wilson (1756-) |
| William Adair (1757-1785) | South Carolina, United States | Kentucky, United States | William Adair (c1718-1812) | Mary Moore (1729-1797) | Mary Irvine (1762-1819) |
| William Adair (1651-1698) | Cairncastle, County Antrim, Ireland | Genoch, County Antrim, Ireland | Patrick Cathcart Adair (1625-1694) | Margaret Cunningham (1625-) | |
| William Adair (1565-1626) | Kilhilt Tower, Portpatrick, Wigtownshire, Scotland, United Kingdom | Kilhilt Tower, Portpatrick, Wigtownshire, Scotland, United Kingdom | Ninian Adair (1531-1608) | Elizabeth Gordon (1535-1608) | Rosina Reilly McClellan (1565-1626) |
| William Adair (1624-1661) | Kilhilt Tower, Portpatrick, Wigtownshire, Scotland, United Kingdom | | Robert Beatty Adair (1583-1655) | Jean Edmonstone (1606-1675) | Anne Helena Scott (c1625-) |
| William Adair (1591-1684) | Kilhilt Tower, Old Luce, Wigtownshire, Scotland, United Kingdom | Ayr, Ayrshire, Scotland, United Kingdom | William Adair (1565-1626) | Rosina Reilly McClellan (1565-1626) | Isabel Montgomery (c1598-) |
| William Albert Adair (1873-1927) | Beaver, Beaver County, Utah, United States | Bluff, San Juan County, Utah, United States | George Washington Adair (1837-1909) | Emily Prescinda Tyler (1847-1917) | Mary Roberta Sawyer (1873-1939) + Lucretia Black (1883-1949) |
| William Andrew Adair (1792-1869) | North Carolina, United States | Paulding County, Georgia, United States | William Bozeman Adair (1771-1857) | Sarah Ann Harrington (1771-1842) | Mary Polly Merensy (1798-1865) |
| William Bozeman Adair (1771-1857) | Virginia, United States | Dallas, Paulding County, Georgia, United States | William Bozeman Adair (1750-1804) | Sara Ann Scott (1754-1829) | Sarah Ann Harrington (1771-1842) |
| William Bozeman Adair (1750-1804) | County Antrim, Northern Ireland, United Kingdom | Jackson County, Georgia, United States | | | Sara Ann Scott (1754-1829) |
| William Crawford Adair (1824-1899) | Autauga County, Alabama, United States | Autauga County, Alabama, United States | Francis Farmer Adair (1792-1845) | Nancy Apperson (1794-1858) | Elizabeth Williams (1828-1896) |
| William Dawson Adair (1917-1991) | Tennessee, United States | | Thomas Ridgeway Adair (1881-1968) | Margaret Clay McDaniel (1889-1969) | Edith Lucile Stephens (1921-2004) |
| William Dawson Adair (1947-2014) | Franklin, Williamson County, Tennessee, United States | Nashville, Davidson County, Tennessee, United States | William Dawson Adair (1917-1991) | Edith Lucile Stephens (1921-2004) | Bobbe Gorin Long (1937-2022) |
| William Henry Adair (1883-1949) | Orderville, Kane County, Utah, United States | Panguitch, Garfield County, Utah, United States | Jedediah Grant Adair (1859-1937) | Florence Ellen Fowler (1860-1946) | Esther Ann Snyder (1889-1970) |
| William Hewitt Adair (1906-1981) | Massachusetts, United States | Fall River, Bristol County, Massachusetts, United States | John Gray Adair (1873-1955) | Clara Esther Fales (1876-1925) | |
| William Jefferson Adair (1830-1846) | Pickens County, Alabama | Mt. Pisgah, Union County, Iowa | Samuel Jefferson Adair (1806-1889) | Jemima Catherina Mangum (1809-1848) | |
| William Jennings Adair (1837-1914) | Missouri | Greenlee County, Arizona, United States | Stephen Adair (1811-1880) | Mary Ann Davis (1820-) | Mary King (1843-1882) + Elizabeth King (1854-1944) |
| William Lawrence Adair (1858-1942) | Arkansas, United States | Tennessee, United States | John Thompson Adair (1812-1891) | Mary Ann Hancock (1834-1912) | Mary Jane Bates (1838-1923) |
| William Penn Adair (1830-1880) | New Echota, Gordon County, Georgia, United States | Washington, District of Columbia, United States | George Washington Adair (1806-1862) | Martha Hammock Martin (1815-1875) | Sarah Ann McNair Adair (1831-1865) + Susannah McIntosh Drew (1844-1939) |
| William Robert Adair (1728-1798) | Ballymena Castle, Ballymena, County Antrim, Northern Ireland, United Kingdom | Ballymena Castle, Ballymena, County Antrim, Northern Ireland, United Kingdom | William Robert Adair (1690-1762) | Catherine Smallman (1701-1752) | Anne McAuley (1735-1798) |
| William Robert Adair (1690-1762) | Ballymena, County Antrim, Northern Ireland, United Kingdom | Ballymena, County Antrim, Northern Ireland, United Kingdom | Robert Adair (1659-1745) | Penelope Coleville (1654-1695) | Catherine Smallman (1701-1752) |
| William Thompson Adair (1850-1931) | Hampshire, England, United Kingdom | Kensington, Middlesex, England, United Kingdom | Charles William Adair (1822-1897) | Isabella Aslett (1823-1900) | Rose Naylor (1854-) |
| William Wallace Adair (1862-1943) | Minersville, Beaver County, Utah, United States | Kanab, Kane County, Utah, United States | George Washington Adair (1818-1897) | Miriam Jane Billingsley (1829-1912) | Mary Josephine Hogan (1865-1931) + Bernice Viola Kleckner (1891-1970) |
