| Holtgrefe, Agnes Johanne Maria | 1964 | ||
| Holtgrefe, Elisabeth Henriette | Zebrowsky | Holtgrefe Johannes | 1925 |
| Holtgrefe, Else Agnes Elisabeth | Holtgrefe Agnes Johanne Maria | 1912 | |
| Holtgrefe, Heinz Wilhelm Hans | 1947 | ||
| Holtgrefe, Helene Elfriede Martha | Hanßen | Holtgrefe Joseph Johannes | 1973 |
| Holtgrefe, Johannes | 1904 | ||
| Holtgrefe, Johannes Carl Ernst August | 1962 |