Commune/Paroisse : Chamonix-Mont-Blanc [Haute-Savoie] 
| Patronymes | Périodes | Actes | |
|---|---|---|---|
| 1. | ODEY | 1698-1759 | 3 |
| 2. | ODEZENNE | 1869 | 1 |
| 3. | ODIER | 1946 | 1 |
| 4. | OLCHANSKI | 1947 | 1 |
| 5. | OLIVIER | 1904-1925 | 2 |
| 6. | OLPHE-GAILLARD | 1952 | 1 |
| 7. | OOSTERLYNCK | 1923 | 1 |
| 8. | ORIGLIO | 1954 | 1 |
| 9. | ORSET | 1700-1896 | 2 |
| 10. | ORTH | 1881 | 1 |
| 11. | ORTOLLAND | 1955 | 1 |
| 12. | OSTERMANN | 1926 | 1 |
| 13. | OSTERO | 1957 | 1 |
| 14. | OSTORERO | 1908 | 1 |
| 15. | OTHNIN-GIRARD | 1956 | 1 |
| 16. | OTT | 1948 | 1 |
| 17. | OUDILLE | 1945 | 1 |
| 18. | OUDIN | 1955 | 1 |
| 19. | OUDJANI-LAKHDAR | 1956 | 1 |
| 20. | OURS | 1849 | 1 |