| Name | Role | Place | Source | |
|---|---|---|---|---|
| Frederik Jacob Duijf | Registered | 1887 | Amsterdam | Population register |
| Frederik Jacob Duijf | Registered | 1913 | Amsterdam | Market cards |
| Frederik Jacob Duijf | Registered | 1913 | Amsterdam | Militia records |
| Frederik Jacob Duijf | Registered | 1913 | Amsterdam | Market cards |
| Frederik Jacob Duijf | Groom | 1913 | Amsterdam | Civil registration marriages |
| Frederik Jacob Duijf | Registered | 1887 | Amsterdam | Militia records |
| Frederik Jacob Duijf | Registered | 1913 | Amsterdam | Police reports |
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