| Name | Role | Place | Source | |
|---|---|---|---|---|
| Jan Hendrik Sickerman | Registered | 1738 | Amsterdam | Church records burials |
| Jan Sickerman | Registered | 1744 | Amsterdam | Notarial records |
| Jan Sickerman | Patiënt | 1753 | Middelburg | Patient registry |
| Jan Sickerman | Registered | 1827 | Wormerveer | Population register |
| Jan Sickerman | Registered | 1745 | Amsterdam | Notarial records |
| Jan Sickerman | Registered | Zaanstad | Population register |
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