| Name | Role | Place | Source | |
|---|---|---|---|---|
| Helperus Hermanus Ritsma | Deceased | 1829 | Noordwijk | Civil registration deaths |
| Helperus Hermanus Ritsma | Curator | 1806 | Tietjerksteradeel | Nedergerechten |
| Helperus Hermanus Ritsma | Father of bride | 1838 | Tietjerksteradeel | Civil registration marriages |
| Helperus Hermanus Ritsma | Registered | 1873 | Achtkarspelen | Population register |
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