| Name | Role | Place | Source | |
|---|---|---|---|---|
| Watze Jorrits Sytsma | Mention | 1907 | Oostdongeradeel | Notarial records |
| Watze Jorrits Sytsma | Renant | 1914 | Oostdongeradeel | Notarial records |
| Watze Jorrits Sytsma | Renant | 1902 | Dantumadeel | Notarial records |
| Watze Sytsma | Mention | 1923 | Oostdongeradeel | Notarial records |
| Watze Sytsma | Koper en huurder | 1916 | Oostdongeradeel | Notarial records |
| Watze Sytsma | Renant | 1904 | Oostdongeradeel | Notarial records |
| Watze Sytsma | Groom | 1888 | Oostdongeradeel, Niawier | Civil registration marriages |
| Watze Sytsma | Relation | 1939 | Niawier | Civil registration deaths |
| Watze Sytsma | Child | 1864 | Oostdongeradeel | Civil registration births |
| Watze Sytsma | Deceased | 1931 | Niawier | Civil registration deaths |
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