| Name | Role | Place | Source | |
|---|---|---|---|---|
| Hermanus Helmke | Military | Studbooks | ||
| Hermanus Helmke | Registered | 1803 | Utrecht | Bedelingsregister |
| Hermanus Helmke | Father | 1820 | Gennep | Civil registration deaths |
| Hermanus Helmke | Registered | Breda | Gevangenisregister | |
| Hermanus Helmke | anderszins vermeld | 1765 | Schepenprotocollen | |
| Hermanus Helmke | Groom | 1827 | Utrecht | Civil registration marriages |
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