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 | |