| Name | Role | Place | Source | |
|---|---|---|---|---|
| Herman Arie Opperman | Child | 1922 | Driel | Civil registration births |
| Herman Christiaan Opperman | Registered | 1736 | Amsterdam | Notarial records |
| Herman Frans Opperman | Registered | 's-Gravenhage | Studbooks | |
| Herman Opperman | Witness | 1756 | Amsterdam | Church records baptisms |
| Herman Opperman | Witness | 1756 | Amsterdam | Church records baptisms |
| Herman Opperman | Travelers | 1905 | Rotterdam | Passenger registers |
| Johan Herman Opperman | Father | 1762 | Amsterdam | Church records baptisms |
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