| Name | Role | Place | Source | |
|---|---|---|---|---|
| Helena Maria van Merkenstein | Child | 1836 | Rotterdam | Civil registration births |
| Helena Maria van Merkenstein | Deceased | 1836 | Rotterdam | Civil registration deaths |
| Helena Maria van Merkenstein | Child | 1836 | Rotterdam | Civil registration births |
| Helena Maria van Merkenstein | Deceased | 1836 | Rotterdam | Civil registration deaths |
| Maria Helena van Merkenstein | Mother | 1874 | Delfshaven | Civil registration births |
| Maria Helena van Merkenstein | Mother | 1874 | Delfshaven | Civil registration births |
| Maria Helena van Merkenstein | Mother | 1888 | Rotterdam | Civil registration deaths |
| Maria Helena van Merkenstein | Mother of bride | 1897 | Rotterdam | Civil registration marriages |
| Maria Helena van Merkenstein | Registered | 1850 | Population register | |
| Maria Helena van Merkenstein | Mother | 1888 | Rotterdam | Civil registration deaths |
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