| Name | Role | Place | Source | |
|---|---|---|---|---|
| Harm Jacob Modderaar | Registered | 1883 | Amsterdam | Overgenomen delen |
| Harm Jacob Modderaar | Child | 1883 | Groningen | Civil registration births |
| Harm Jacob Modderaar | Groom | 1911 | Tiel | Civil registration marriages |
| Harm Jacob Modderaar | Deceased | 1959 | Haren | Civil registration deaths |
| Harm Jacob Modderaar | Registered | Tiel | Population register | |
| Harm Jacob Modderaar | Registered | Tiel | Population register | |
| Harm Jacob Modderaar | Relation | 1950 | Groningen | Civil registration deaths |
| Harm Jacob Modderaar | Father | 1911 | Groningen | Civil registration births |
| Harm Jacob Modderaar | Registered | Tiel | Population register | |
| Harm Jacob Modderaar | Registered | 1893 | Tiel | Population register |
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