| Name | Role | Place | Source | |
|---|---|---|---|---|
| G. Dapper | Registered | 1863 | Amsterdam | Family cards |
| G. Dapper | Registered | 1840 | Den Helder | Population register |
| G. Dapper | Registered | 1892 | Amsterdam | Family cards |
| G. Dapper | Signatory | 1878 | 's-Gravenhage | Verzoekschriften |
| G. Dapper | Signatory | 1878 | 's-Gravenhage | Verzoekschriften |
| Hendrik Jacobus G. Dapper | Registered | 1848 | Amsterdam | Population register |
| Hendrikus Jacobus G. Dapper | Registered | 1848 | Amsterdam | Population register |
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