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 | 
 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 | 
 1845-1909
| Elias Leonard | |
| B: | 24 October 1845 | 
| Bryan, Williams County, Ohio, United States of America | |
| D: | 11 January 1909 | 
| Elkhart, Elkhart County, Indiana, United States of America | |
 1863-1936
| Henry Keelin Leonard | |
| B: | 27 April 1863 | 
| Lanark, Carroll County, Illinois, United States of America | |
| D: | 31 August 1936 | 
| Aurelia, Cherokee County, Iowa, United States of America | |
 1816-1891
| Elizabeth Dice | |
| B: | 9 Oct 1816 | 
| Carlisle, Cumberland, Pennsylvania, USA | |
| D: | 26 Feb 1891 | 
| Aurelia, Cherokee, Iowa, USA | |
 1811-1901
| Keelin Leonard | |
| B: | 15 Aug 1811 | 
| Rowan County, North Carolina, United States of America | |
| D: | 25 Mar 1901 | 
| Sheldon, O'Brien County, Iowa, United States of America | |