A farmer, he married Elizabeth May Robertson 1787-1869 on May 2, 1806 in Laurens District, South Carolina.

They had at least nine children, the first six were born in Laurens County, South Carolina, and starting with Dr. William Washington Adair they were born in Perry County, Alabama:

Elvira Adair, 1807-about 1825, died at age 18, born in Laurens County, South Carolina, and died in Perry County.

Mary E. "Polly" Adair, 1808-before 1860, married Joseph "Joe" Scott, abt 1802-abt 1880, on Feb 17, 1830, in Perry County, Alabama. Both died in Houston County, Texas.

Nancy Adair, 1810-1852, married James McLemore, abt 1806-?, on Jan 31, 1837 in Perry County, Alabama. She died in Perry County, and he in Texas.

Pernice "Pernsey" Adair, 1812-1853, married Anderson Motes, abt1798-abt1845, on June 24, 1831 in Perry County, Alabama. Both died in Perry County.

Benjamin Franklin Adair, 1814-?, believed to have lived out his life in Hot Springs, Garland County, Arkansas.

Rebecca Long Adair, 1816-1873, married Hugh Walter Goodwin, 1806-1856, on Dec 5, 1836 in Perry County. Both died in Houston County, Texas.

William Washington Adair, Jr., MD, 1818-1890, married first Candice A. H. "Candia" Lockett, 1827-1851, on Nov 14, 1843 in Marengo County, Alambaba, then married Jane Elizabeth Rentz, 1835-1894, on July 30, 1852 in Wilcox County, Alabama. Candia died in Perry County, Alabama, Jane in Fayetteville, Lincoln County, Tennessee while visiting her sister, and Dr. Adair in Dallas, Texas.

Martha Elizabeth Adair, 1821-1860, married first James Terry, 1812-1843, on Feb 25, 1839 in Perry County, then married William B. McHenry, 1811-1886, on Dec 16, 1845 in Perry County. Martha and William died in Houston County, Texas, and James Terry in Perry County.

Emeline T. Adair, 1824-1869, married William George Steed, 1808-1881, on Oct 23, 1841 in Perry County. Both died in Houston County, Texas.

Most of the above information is from extensive written Adair family history, page 182, available online.