| Name | Role | Place | Source | |
|---|---|---|---|---|
| BOERSEN, C. | Partner | Delft | Population register | |
| C. Boersen | Registered | 1904 | Amsterdam | Family cards |
| C. Boersen | Travelers | 1962 | Rotterdam | Passenger registers |
| C. Boersen | Signatory | 1878 | 's-Gravenhage | Verzoekschriften |
| C. Boersen | Signatory | 1878 | 's-Gravenhage | Verzoekschriften |
| C. Boersen | Military | 's-Gravenhage | Staat van dienst | |
| C. Boersen | Mention | 1939 | Nijmegen | Inschrijvingsregister Vierdaagse |
| Gerrit C. Boersen | Registered | 1798 | Texel | Notarial records |
| Martje C. Boersen | Registered | 1830 | Texel | Population register |
| Neeltje C. Boersen | Registered | 1830 | Texel | Population register |
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