Commune/Paroisse : Machilly [Haute-Savoie] 
| Patronymes | Périodes | Actes | |
|---|---|---|---|
| 1. | COCON | 1780 | 1 |
| 2. | COLLET | 1881-1894 | 2 |
| 3. | COLLOMB | 1849 | 1 |
| 4. | COMTE | 1863-1916 | 16 |
| 5. | CONDEVAUX | 1892 | 1 |
| 6. | CONDEVEAUX | 1909 | 1 |
| 7. | CONSTANT | 1863 | 1 |
| 8. | CONTAZ | 1859 | 1 |
| 9. | CONVERS | 1827 | 1 |
| 10. | CORNU | 1677 | 1 |
| 11. | CORNU ALIAS MEGEVET | 1694 | 1 |
| 12. | CORNUT | 1680-1694 | 2 |
| 13. | CORT | 1750 | 1 |
| 14. | CORTAGIER | 1681 | 1 |
| 15. | COSTA | 1819 | 1 |
| 16. | COSTAZ | 1844-1910 | 8 |
| 17. | COTELLARD | 1822-1829 | 2 |
| 18. | COTERLAZ | 1897-1915 | 4 |
| 19. | COTTERLAZ | 1876 | 1 |
| 20. | COTTET | 1617-1905 | 4 |
| 21. | COTTIER | 1699-1700 | 2 |
| 22. | COTTY | 1664-1672 | 3 |
| 23. | COTTYE | 1657 | 1 |
| 24. | COTY | 1657-1660 | 2 |
| 25. | COUP | 1814-1817 | 2 |
| 26. | COURBE | 1819 | 1 |
| 27. | COURT | 1669-1915 | 42 |
| 28. | COURT DIT REGUELIUZ | 1751 | 1 |
| 29. | COUTI | 1764-1834 | 2 |
| 30. | COUTIL | 1885 | 2 |
| 31. | COUTTY | 1676-1747 | 4 |
| 32. | COUTY | 1662-1889 | 31 |
| 33. | COUX | 1840-1853 | 2 |