| Name | Role | Place | Source | |
|---|---|---|---|---|
| George Jan Ulysses Modderman | Registered | 1885 | Groningen | Population register |
| George Jan Ulysses Modderman | Deceased | 1886 | Dronrijp | Civil registration deaths |
| Jan Ulysses Modderman | Father of groom | 1871 | Tietjerksteradeel | Civil registration marriages |
| Jan Ulysses Modderman | Deceased | 1927 | Amersfoort | Civil registration deaths |
| Pieter Jan Ulysses Modderman | Registered | Pension registry | ||
| Pieter Jan Ulysses Modderman | Father of groom | 1917 | Amersfoort | Civil registration marriages |
| Pieter Jan Ulysses Modderman | Father of groom | 1917 | Amersfoort | Civil registration marriages |
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