| Name | Role | Place | Source | |
|---|---|---|---|---|
| Friedrich Gustav Kupper | Father of groom | 1882 | Venlo | Civil registration marriages |
| Friedrich Gustav Kupper | Father of groom | Venlo | Civil registration marriages | |
| Gustav Kupper | Registered | 1909 | Bergh | Population register |
| Gustav Kupper | Registered | 1910 | Population register | |
| Gustav Wilhelm Paul Küpper | Father of bride | 1936 | Renkum | Civil registration marriages |
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