| Name | Role | Place | Source | |
|---|---|---|---|---|
| S.E. van Praag | Registered | 1899 | Amsterdam | Family cards |
| S.E. van Praag | Registered | 1788 | Amsterdam | Notarial records |
| S.E. van Praag | Belanghebbende | 1809 | Notarial records | |
| S.E. van Praag | Geconstitueerde | 1795 | Notarial records | |
| S.E. van Praag Sigaar | Registered | 1919 | Amsterdam | Passport applications |
| S.E. van Praag Sigaar | Registered | 's-Gravenhage, Amsterdam | Management file |
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