| Name | Role | Place | Source | |
|---|---|---|---|---|
| Constant Frederik Blok | Registered | 's-Gravenhage | Studbooks | |
| Constant Frederik Blok | Deceased | 1891 | Rotterdam | Civil registration deaths |
| Constant Frederik Blok | Registered | 1880 | Population register | |
| Constant Frederik Blok | Deceased | 1891 | Rotterdam, Ternate | Civil registration deaths |
| Constant Frederik Blok | Groom | 1891 | 's-Gravenhage | Civil registration marriages |
| Constant Frederik Joan Blok | Registered | 1811 | Ned. Indie | Population register |
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