| Name | Role | Event | DateYear | Place | Source |
|---|---|---|---|---|---|
| Jenko Freerk Groenhagen | Child | Birth | 6-10-1922 | Oterdum | Civil registration births |
| Jenko Groenhagen | Father | Death | 19-10-1872 | Oude Pekela | Civil registration deaths |
| Jenko Groenhagen | Father | Birth | 9-3-1881 | Oterdum | Civil registration births |
| Jenko Groenhagen | Child | Birth | 25-1-1851 | Termunten | Civil registration births |
| Jenko Groenhagen | Father | Death | 23-1-1916 | Delfzijl | Civil registration deaths |
| Jenko Groenhagen | Groom | Marriage | 21-5-1909 | Termunten | Civil registration marriages |
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