| Name | Role | Place | Source | |
|---|---|---|---|---|
| Siewert Backer | Registered | 1740 | Amsterdam | Notarial records |
| Siewert Backer | Registered | 1741 | Amsterdam | Notarial records |
| Siewert Backer | Registered | 1732 | Amsterdam | Church records burials |
| Siewert Backer | Witness | 1718 | Amsterdam | Church records baptisms |
| Siewert Backer | Witness | 1718 | Amsterdam | Church records baptisms |
| Siewert Backer | Registered | 1724 | Amsterdam | Notarial records |
| Siewert Everts Backer | Registered | 1775 | Amsterdam | Notarial records |
| Siewert Laasen Backer | Registered | 1691 | Amsterdam | Notarial records |
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