| Name | Role | Place | Source | |
|---|---|---|---|---|
| Aagje Plokken | Mother | 1926 | Katwijk | |
| Catharina Agnes Plokken | Mother of bride | 1871 | Rimburg | Civil registration marriages | 
| Cornelia Johanna Plokken | Mother | 1849 | Dordrecht | Civil registration deaths | 
| Cornelia Johanna Plokken | Mother | 1849 | Dubbeldam | Civil registration deaths | 
| Cornelia Johanna Plokken | Mother | 1849 | Dubbeldam | Civil registration deaths | 
| Maarten Plokken | Person in the population register | 1850 | Zierikzee | Population register | 
| Willempje Plokken | Partner | 1839 | Maarn | Civil registration deaths | 
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