| Generation 1 | |
| [1.01 2] Robert William McMahan (1864-1942) | LA-AR |
| Generation 2 | |
| [1.02 3] Hugh Blair McMahan (1804-1880) | SC-AL-TN-LA-AR |
| [2.01* ] Martha Ann Cockran (1826-1898) | GA-LA-AR |
| Generation 3 | |
| [1.03* ] David McMahen (~1775-~1828) | CE-TN-USA-TN-AL |
| [3.01* ] Sarah Unknown (~1780-) | CE-TN |
