| Generation 1 | |
| [1.01 2] James D. McMahan (1886-) | TX |
| Generation 2 | |
| [1.02 3] William Arthur McMahan (1855-) | AR |
| [2.01* ] Nancy E (1859-) | AR |
| Generation 3 | |
| [1.03 4] David McMahan (1828-1901) | TN-AR-TX |
| [3.01* ] Elizabeth ’Betsy’ Ann Bussett (1838-1916) | GA-AR-TX |
| Generation 4 | |
| [1.04 5] Hugh Blair McMahan (1804-1880) | SC-AL-TN-LA-AR |
| [4.01 6] Elizabeth HOOD (1807-1857) | SC-AL-TN-LA |
| Generation 5 | |
| [1.05* ] David McMahen (~1775-~1828) | CE-TN-USA-TN-AL |
| [4.02* ] Mathew Hood, Sr. (1756-1821) | SC |
| [5.01* ] Sarah Unknown (~1780-) | CE-TN |
| [6.01* ] Mary Smith (1759-1824) | SC |
