| Name | Role | Place | Source | |
|---|---|---|---|---|
| Folquerus | Baptized | 1763 | Harlingen | Church records baptisms |
| Folquerus Clavant | Child | 1721 | Leiden | |
| Folquerus Emmius | Registered | 1618 | Leuven | Registration Register |
| Folquerus Wanan | Witness | 1721 | Leiden | |
| Folquerus van 't Hoff | Father | 1835 | Utrecht | Civil registration births |
| Folquerus van 't Hoff | Father | 1908 | Utrecht | Civil registration deaths |
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