| Name | Role | Place | Source | |
|---|---|---|---|---|
| Frederik Willem Keyzer | Registered | 1860 | Population register | |
| Frederik Willem Keyzer | Groom | 1873 | Rotterdam | Civil registration marriages |
| Frederik Willem Keyzer | Groom | 1873 | Rotterdam | Civil registration marriages |
| Johan Willem Frederik Keyzer | Child | 1879 | Weststellingwerf | Civil registration births |
| Willem George Frederik Keyzer | Registered | 1856 | Inschrijfregister | |
| Willem George Frederik Keyzer | Detainee | 1848 | Heerenveen, 's-Gravenhage | Gevangenisregister |
| Willem Hendrik Frederik Karel Keyzer | Deceased | 1965 | Rotterdam, Dordrecht | Civil registration deaths |
| Willem Karel Frederik Keyzer | Father | 1962 | Apeldoorn | Civil registration deaths |
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