16 Dec 1836 - Birth of his biological father David Leonard at Columbus, Franklin County, Ohio, USA 

6 Dec 1845 - Birth of his biological mother Martha Dutton at Crete, Will County, Illinois, USA 

Abt 1865 - Marriage of parents at Iowa, USA 

4 Aug 1878 - Birth at Walford, Benton County, Iowa, USA 

22 Mar 1881 - (2 years) Birth of his wife Melissa Wood at Ida County, Iowa, USA 

7 Mar 1900 - (21 years) Marriage with Melissa Wood at Ida Grove, Ida County, Iowa, USA 

21 Dec 1900 - (22 years) Birth of his son Lyle Leonard at Lake City, Calhoun County, Iowa, USA 

14 Feb 1904 - (25 years) Birth of his son Don Leonard at Lake City, Calhoun County, Iowa, USA 

15 Sep 1918 - (40 years) Death of his biological mother Martha Dutton at Lake City, Calhoun County, Iowa, USA 

Sep 1918 - (40 years) Burial of his biological mother Martha Dutton at Cottonwood Cemetery, Lake City, Calhoun County, Iowa, USA 

4 Dec 1920 - (42 years) Birth of his son Leon Leonard at Lake City, Calhoun County, Iowa, USA 

06 Jan 1928 - (49 years) Death of his biological father David Leonard at Lake City, Calhoun County, Iowa, USA 

Jan 1928 - (49 years) Burial of his biological father David Leonard at Cottonwood Cemetery, Lake City, Calhoun County, Iowa, USA 

18 Oct 1957 - (79 years) Death of his wife Melissa Wood at Lake City, Calhoun County, Iowa, USA 

30 May 1958 - (79 years) Death of his son Don Leonard at Houston, Harris County, Texas, USA 

27 Feb 1960 - (81 years) Death at Lake City, Calhoun County, Iowa, USA 

13 Sep 1973 - Death of his son Lyle Leonard at Denver, Denver County, Colorado, USA 

24 Jul 2000 - Death of his son Leon Leonard at Denver, Denver County, Colorado, USA