Individual Details
Living
( - )
Families
| Father | Harley Joseph GRETHEN (1929 - 1994) |
| Mother | Charlotte Marie PERRIGO (1930 - 1994) |
| Sibling | David Joseph GRETHEN (1950 - 2024) |
| Sibling | Living |
| Sibling | Living |
| Sibling | Jerome Peter GRETHEN (1960 - 2023) |
| Sibling | Anita GRETHEN ( - ) |