1901-1987
| Carroll Mendenhall Leonard | |
| B: | 9 Jun 1901 |
| Edna, Cass, Iowa, USA | |
| D: | 10 Nov 1987 |
| Stillwater, Payne, Oklahoma, USA | |
1906-1975
| Helen Cora Romary | |
| B: | 7 Oct 1906 |
| D: | 3 Nov 1975 |
1925-2006
| Edward Lantz Leonard | |
| B: | 7 May 1925 |
| Troy, Rensselaer County, New York, United States of America | |
| D: | 11 November 2006 |
| Orange, Orange County, California, United States of America | |
1928-2011
| Carroll Marcus Leonard | |
| B: | 13 August 1928 |
| Manhattan, Riley County, Kansas, United States of America | |
| D: | 21 November 2011 |
| Albuquerque, Bernalillo County, New Mexico, United States of America | |
1934-2007
| William Dean Leonard | |
| B: | 29 November 1934 |
| Stillwater, Payne County, Oklahoma, United States of America | |
| D: | 28 April 2007 |
| San Jose, Santa Clara County, California, United States of America | |
1901-1932
| Grace Leonard | |
| B: | 26 November 1901 |
| Randolph, Riley County, Kansas, United States of America | |
| D: | 13 February 1932 |
| Logan County, Oklahoma, United States of America | |
1872-1964
| Marcus Leonard | |
| B: | 23 Apr 1872 |
| Lanark, Carroll, Illinois, USA | |
| D: | 18 Jul 1964 |
| Stillwater, Payne, Oklahoma, USA | |
1879-1957
| Mabel Wayne Dix | |
| B: | 15 May 1879 |
| Honeoye Falls, Monroe, New York, USA | |
| D: | 17 May 1957 |
| Salina, Saline, Kansas, USA | |
|
1837-1907
| William Leonard | |
| B: | 4 Mar 1837 |
| Bryan, Williams, Ohio, USA | |
| D: | 16 Jun 1907 |
| Rock Rapids, Lyon, Iowa, USA | |
1843-1886
| Nancy Jane Grigsby | |
| B: | 14 Feb 1843 |
| D: | 8 Aug 1886 |