| Helkenberg, Caroline Helene | 1961 | ||
| Helkenberg, Caroline Henriette Christiane | Casten | Helkenberg Friedrich Heinrich Christian | 1905 |
| Helkenberg, Dorothee Elisabeth | Brockmann | Helkenberg Paul | 1929 |
| Helkenberg, Friedrich | 1949 | ||
| Helkenberg, Friedrich Heinrich Christian | 1905 | ||
| Helkenberg, Paul | 1926 |