| Name | Role | Place | Source | |
|---|---|---|---|---|
| Jacob Dooper | Conscript | 1897 | Militia records | |
| Jacob Dooper | Child | 1877 | Doniawerstal | Civil registration births |
| Jacob Dooper | Registered | 1877 | Nijega | Population register |
| Jacob Hielkes Dooper | Registered | 1877 | Nijega | Population register |
| Jacob Johannes Dooper | Mention | 1815 | Militia records | |
| Jacob Johannes Dooper | Father | 1834 | Workum | Civil registration deaths |
| Jacob Johannes Dooper | Father | 1859 | Hartwerd | Prayer card collection |
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