Individual Details
Living
( - )
Families
| Child | Living |
| Father | Karl Isidor Gustafsson Lennartz (1886 - 1923) |
| Mother | Sophie Anna Borrenkott (1891 - 1989) |
| Sibling | Karl Heinrich Josef Ulf Lennartz (1912 - 2001) |
| Sibling | Maria Elisabet Lennartz (1917 - 1990) |
| Sibling | Stig Gustaf-Adolf Lennartz (1919 - 2004) |