| Name | Role | Place | Source | |
|---|---|---|---|---|
| Jan Mathijs Ernest Voncken | Partner | 1922 | Voerendaal | Civil registration deaths |
| Jan Mathijs Ernest Voncken | Father of groom | 1935 | Klimmen | Civil registration marriages |
| Jan Mathijs Ernest Voncken | Father | 1924 | Voerendaal | Civil registration deaths |
| Jan Mathijs Ernest Voncken | Father of groom | 1939 | Vaals | Civil registration marriages |
| Jan Mathijs Ernest Voncken | Partij | 1883 | Heerlen | Notarial records |
| Jan Mathijs Ernest Voncken | Counterparty | 1864 | Heerlen | Notarial records |
| Jan Mathijs Ernest Voncken | Counterparty | 1864 | Heerlen | Notarial records |
| Jan Mathijs Ernest Voncken | Partij | 1883 | Heerlen | Notarial records |
| Jan Mathijs Ernest Voncken | Father | 1916 | Voerendaal | Civil registration births |
| Jan Mathijs Ernest Voncken | Father | 1908 | Simpelveld | Civil registration births |
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