| Name | Role | Place | Source | |
|---|---|---|---|---|
| Bernard Adriaan Louis Eduard Swartz | Groom | 1949 | Utrecht, Madioen | Civil registration marriages |
| Georges Louis Marie de Swartz | Registered | 1934 | Den Helder | Notarial records |
| Georges Louis Marie de Swartz | Registered | 1934 | Den Helder | Notarial records |
| Louis Swartz | Registered | Maastricht | Population register | |
| Louis Swartz | Registered | Maastricht | Population register | |
| William Louis George Antonie Swartz | Partner | 1945 | Utrecht | Civil registration deaths |
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