Individual Details
John Thomas Greif
( - )
Families
| Spouse | Amy Herrmann |
| Father | Charles B. Greif (1895 - 1979) |
| Mother | Clara Barbara Nathe (1909 - 1983) |
| Sibling | Joseph John Greif (1940 - 1940) |
| Sibling | Adelaide M. Greif (1941 - 1941) |
| Sibling | Arthur Ernest Greif |
| Sibling | Francis Paul Greif |
| Sibling | William Charles Greif (1949 - 1953) |