For more information on sources and notes on the families, check SOURCES below the table.
| Ancestry of William E. Borah | |
|---|---|
| 1 |
William Edgar Borah,
b. Fairfield, Wayne, Illinois, 29 June 1865,
d. 19 January 1940,
  md. Idaho, 21 April 1895, Mary McConnell, daughter of William J. McConnell |
| 2ND GENERATION (PARENTS) | |
| 2 |
William Nathan Borah,
b. Butler County, Kentucky, 7 March 1818,
d. 31 August 1910
  md. Wayne County, Illinois, January 1846 |
| 3 | Elizabeth West, b. Illinois, 19 March 1829, d. 1 October 1900 |
| 3RD GENERATION (GRANDPARENTS) | |
| 4 |
John Borah
  md. |
| 5 | Sarah Wilson |
| 6 |
  md. |
| 7 | |
| 4TH GENERATION (GREAT-GRANDPARENTS) | |
| 8 |
  md. |
| 9 | |
| 10 |
  md. |
| 11 |
|