| Name | Role | Place | Source | |
|---|---|---|---|---|
| Hendricus Maria Dapper | Registered | 1921 | Alkmaar | Notarial records |
| Hendricus Maria Dapper | Person in notarial deed | 1928 | Obdam | Notarial records |
| Hendricus Maria Dapper | Registered | 1920 | Alkmaar | Notarial records |
| Hendricus Maria Dapper | Registered | 1932 | Alkmaar | Notarial records |
| Hendricus Maria Dapper | Registered | 1934 | Alkmaar | Notarial records |
| Hendricus Maria Dapper | Registered | 1934 | Alkmaar | Notarial records |
| Hendricus Maria Dapper | Registered | 1923 | Bergen | Notarial records |
| Hendricus Maria Dapper | Registered | 1930 | Alkmaar | Notarial records |
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