Commune/Paroisse : Ajaccio [Corse du Sud]
| Patronymes | Périodes | Actes | |
|---|---|---|---|
| 1. | OCANA | 0-1832 | 9 |
| 2. | ODDIARDO | 1812 | 1 |
| 3. | ODIFRAI | 1812 | 1 |
| 4. | ODONE | 1807-1809 | 3 |
| 5. | OFFAND | 1813 | 1 |
| 6. | OLIVA | 0-1832 | 21 |
| 7. | OLIVE | 1816 | 1 |
| 8. | OLIVETTI | 1813 | 1 |
| 9. | OLIVIERI | 0-1828 | 9 |
| 10. | OLIVIÈRI | 1813 | 2 |
| 11. | OLLIER | 1827 | 1 |
| 12. | OLMETA | 1817-1829 | 3 |
| 13. | OLUCETA | 1825 | 1 |
| 14. | ONESTI | 1826-1828 | 2 |
| 15. | ONETO | 1814-1815 | 2 |
| 16. | ONIC | 1832 | 1 |
| 17. | ONORA | 1813 | 1 |
| 18. | ORBALACONE | 0-1828 | 4 |
| 19. | ORBALACONE DIT ARRIGHI | 1829 | 1 |
| 20. | ORDORICCI | 1814 | 1 |
| 21. | OREFICI | 1829 | 1 |
| 22. | ORELLI | 1813 | 1 |
| 23. | ORNANO | 0-1832 | 15 |
| 24. | ORSATI | 0 | 1 |
| 25. | ORSI | 1824 | 1 |
| 26. | ORSINI | 0-1823 | 5 |
| 27. | ORSOLINI | 1824 | 1 |
| 28. | ORSONI | 1814-1831 | 12 |
| 29. | ORTE | 0 | 1 |
| 30. | ORTO | 0-1810 | 6 |
| 31. | ORTOLI | 1814 | 1 |
| 32. | ORZINI | 0-1816 | 5 |
| 33. | ORZONI | 1811-1827 | 3 |
| 34. | OSANICH | 1814 | 1 |
| 35. | OTA | 1807 | 1 |
| 36. | OTANO | 1825 | 1 |
| 37. | OTTAVI | 0-1815 | 6 |
| 38. | OTTAVIANI | 1826 | 1 |
| 39. | OTTOMANI | 1826 | 1 |
| 40. | OUDIN | 1824 | 1 |
| 41. | OURICH | 1811 | 1 |
| 42. | OURSI | 1812 | 1 |
| 43. | OUTRE | 1807 | 1 |