| Name | Role | Place | Source | |
|---|---|---|---|---|
| Albert John Cramer | Registered | 1785 | Amsterdam | Notarial records |
| John Cramer | Father | 1770 | Rotterdam | Church records baptisms |
| John Cramer | Registered | 1646 | Dordrecht | Church records marriages |
| John Cramer | Father | 1766 | Rotterdam | Church records baptisms |
| John Cramer | Registered | 1646 | Dordrecht | Church records marriages |
| John Cramer | Eerdere partner | 1777 | Rotterdam | Church records burials |
| John Cramer | Travelers | 1955 | New York | Passenger registers |
| John Ludolph Cramer | Registered | 1789 | Amsterdam | Notarial records |
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