| Name | Role | Place | Source | |
|---|---|---|---|---|
| Gerard Jozef Mathieu Friederichs | Witness | 1947 | Kerkrade | Civil registration deaths |
| Gerard Jozef Mathieu Friederichs | Witness | 1947 | Kerkrade | Civil registration deaths |
| Gerrit Jozef Mathieu Friederichs | Witness | 1949 | Kerkrade | Civil registration deaths |
| Johan Mathieu Friederichs | Witness | 1958 | Kerkrade | Civil registration deaths |
| Johan Mathieu Friederichs | Father | 1958 | Kerkrade | Civil registration deaths |
| Mathieu Friederichs | Father of bride | 1872 | Brussel | Civil registration marriages |
| Mathieu Johan Maria Friederichs | Deceased | 1958 | Kerkrade | Civil registration deaths |
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