| Name | Role | Place | Source | |
|---|---|---|---|---|
| Jan Derwall | Father | 1903 | Kerkrade | Civil registration births |
| Jan Derwall | Father | 1903 | Kerkrade | Civil registration births |
| Jan Derwall | Witness | 1903 | Kerkrade | Civil registration births |
| Jan Derwall | Partner | 1939 | Kerkrade | Civil registration deaths |
| Jan Derwall | Partner | 1939 | Kerkrade | Civil registration deaths |
| Jan Derwall | Deceased | 1994 | Maastricht | Prayer card collection |
| Jan Gerard Derwall | Registered | 's-Gravenhage, Kerkrade | CABR dossiers |
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