| James Wellington McMahan | > | John Calvin McMahan | Rachel Calvert | |
| William C. McMahan | b 19 May 1807 | |||
| | b 12 Nov 1849 | Dicie W. Ault | |||
| John Q. McMahan | d 23 Nov 1926 | b 06 Sep 1821 | ||
| |b 11 Nov 1887 | | | |||
| |d 08 Apr 1946 | Ainer E. | |||
| | | b 25 Sep 1849 | |||
| Ruth McMahan | d 25 Dec 1922 | |||
| |Pearl Flynn | | | |||
| | | | | |||
| Sitha Clark | ||||
| b 27 Feb 1884 | | | |||
| d 07 Nov 1969 | ||||
Source: 'The Final Irony,' Katherine Lane Nichols, 1974, p 196.