Commune/Paroisse : St Yon [Essonne] 
| Patronymes | Périodes | Actes | |
|---|---|---|---|
| 1. | CABUE | 1739-1747 | 2 |
| 2. | CADIN | 1740 | 1 |
| 3. | CAILLAUX | 1809-1839 | 2 |
| 4. | CARIBEAU | 1826 | 1 |
| 5. | CARIER | 1807 | 1 |
| 6. | CASSE | 1810-1823 | 2 |
| 7. | CAYROL | 1830 | 1 |
| 8. | CAZIN | 1836 | 1 |
| 9. | CEDAR | 1788 | 1 |
| 10. | CERTAINVILLIER | 1764 | 1 |
| 11. | CHABAILLE | 1859 | 1 |
| 12. | CHABAULT | 1864 | 1 |
| 13. | CHAMPENOIS | 1832-1838 | 5 |
| 14. | CHANEVAT | 1741 | 1 |
| 15. | CHANON | 1868 | 1 |
| 16. | CHANSARD | 1823 | 2 |
| 17. | CHAPELIER | 1807 | 1 |
| 18. | CHAPLIN | 1861 | 1 |
| 19. | CHAUMETTE | 1786-1849 | 2 |
| 20. | CHENEVAT | 1741 | 1 |
| 21. | CHEVALIER | 1759 | 1 |
| 22. | CHEVALLIER | 1831-1899 | 3 |
| 23. | CHICOT | 1799-1886 | 4 |
| 24. | CHIQUOT | 1805-1831 | 3 |
| 25. | CHRISTIEN | 1838 | 1 |
| 26. | CLAUDEL | 1878 | 1 |
| 27. | CLAUSEAU | 1823-1825 | 2 |
| 28. | CLION? | 1824 | 1 |
| 29. | COCHIN | 1900 | 1 |
| 30. | COEFFIER | 1749 | 1 |
| 31. | COGNERAT | 1826 | 1 |
| 32. | COIFFIER | 1855 | 1 |
| 33. | COIGNET | 1780 | 1 |
| 34. | COLLIGNON | 1856 | 1 |
| 35. | COLONA | 1858 | 1 |
| 36. | CORBIN | 1834 | 1 |
| 37. | CORET | 1788 | 1 |
| 38. | COURTIN | 1795-1843 | 2 |
| 39. | COUSIN | 1792 | 1 |
| 40. | CURE | 1753 | 1 |
