Individual Details
Living
( - )
Families
| Spouse | Living |
| Child | Living |
| Spouse | Living |
| Father | Anton Clement "Tony" Horstmann Jr. (1908 - 1982) |
| Mother | Louisa Marie Breuer (1912 - 1999) |
| Sibling | Thomas Anton Horstmann (1936 - 2000) |
| Sibling | Living |
| Sibling | Bernard Horstmann (1952 - 1986) |
| Sibling | Living |