Commune/Paroisse : Petite-Synthe
| Patronymes | Périodes | Epoux | Epouses | |
|---|---|---|---|---|
| 1. | OBEIN | 1806 | 1 | - |
| 2. | OBERRE | 1827 | 1 | - |
| 3. | OBERT | 1870 | 1 | - |
| 4. | ODONA | 1864-1897 | 4 | - |
| 5. | OLIEU | 1814 | 1 | - |
| 6. | OLIVIER | 1875 | - | 1 |
| 7. | OREEL | 1874 | 1 | - |
| 8. | OSAER | 1895 | 1 | - |
| 9. | OUTERLEY | 1807 | - | 1 |
| 10. | OUTIER | 1879 | 1 | - |
| 11. | OUTTERS | 1863 | 1 | - |
| 12. | OUTTIER | 1859-1893 | 3 | 3 |
| 13. | OVAERE | 1833-1867 | 2 | 4 |
| 14. | OVERLOT | 1902 | 1 | - |