| Name | Role | Place | Source | |
|---|---|---|---|---|
| Jan Baptist Van der Slagh | Witness | 1816 | Asse | Civil registration marriages |
| Jan Baptist Vander Slagh | Father of groom | 1866 | Sint-Ulriks-Kapelle | Civil registration marriages |
| Jan Baptist van der Slagh | Witness | 1824 | Sint-Ulriks-Kapelle | Civil registration marriages |
| Jan Baptista van der Slagh | Witness | 1827 | Sint-Ulriks-Kapelle | Civil registration marriages |
| Jan Gemmer Slagh | Groom | 1767 | Amsterdam | Fines |
| Jan Gerritsz van der Slagh | Relation | 1690 | Delft | Church records burials |
| Jan Gerritsz van der Slagh | Relation | 1690 | Delft | Church records burials |
| Jan Slagh | Witness | 1732 | Amsterdam | Church records baptisms |
| Jan van der Slagh | Employee | 1701 | Rotterdam | Personnel-administration |
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