1846 - 1915 (69 years)
| Helen Alvaretta Riggs 1929-Unknown |
| Helen Alvaretta Riggs | |
| B: | 16 Sep 1929 |
| Boone, Boone County, Iowa | |
| D: | Unknown |
| Vernon Eugene Carlson 1923-1988 |
| Vernon Eugene Carlson | |
| B: | 9 Jun 1923 |
| Boone, Boone County, Iowa | |
| M: | 24 Jan 1948 |
| Boone, Boone County, Iowa | |
| D: | 15 Jun 1988 |
| Phoenix, Maricopa County, Arizona | |
| Howard Lee Riggs 1897-1973 |
| Howard Lee Riggs | |
| B: | 26 Jul 1897 |
| Bismarck, Burleigh County, North Dakota | |
| D: | 23 Aug 1973 |
| Boone, Boone County, Iowa | |
| Harrietta Gibson Fisher 1904-1988 |
| Harrietta Gibson Fisher | |
| B: | 4 Dec 1904 |
| Boone, Boone County, Iowa | |
| M: | 20 Apr 1924 |
| Boone, Boone County, Iowa | |
| D: | 10 Aug 1988 |
| Des Moines, Polk County, Iowa | |
| John Riggs 1846-1915 |
| John Riggs | |
| B: | 14 May 1846 |
| Saint Clairsville, Belmont County, Ohio | |
| D: | 20 May 1915 |
| Bismarck, Burleigh County, North Dakota | |
| Fannie Beatrice Bacon 1867-1952 |
| Fannie Beatrice Bacon | |
| B: | 14 May 1867 |
| Pithole City, Venango County, Pennsylvania | |
| M: | 29 May 1895 |
| Bismarck, Burleigh County, North Dakota | |
| D: | 19 Apr 1952 |
| Boone, Boone County, Iowa | |
