| Name | Role | Place | Source | |
|---|---|---|---|---|
| Jan Classes | Employee | 1784 | Amsterdam | Personnel-administration |
| Jan Classes | Father | 1732 | Dokkum | Church records baptisms |
| Jan Classes | Registered | 1762 | Amsterdam | Notarial records |
| Jan Classes | Father | 1616 | Leeuwarden | Church records baptisms |
| Jan Classes | Father | 1650 | Harlingen | Church records baptisms |
| Jan Classes | Groom | 1634 | Sneek | Church records marriages |
| Jan Classes Zijl | Groom | 1790 | Kerkelijke gemeente Zuidwolde | Church records marriages |
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