Commune/Paroisse : Champlan [Essonne] 
| Patronymes | Périodes | Intervenant 1 | Intervenant 2 | |
|---|---|---|---|---|
| 1. | COBUS | 1828-1849 | 1 | 1 |
| 2. | COCHET | 1637 | - | 1 |
| 3. | COCHETEAU | 1645 | 1 | - |
| 4. | COCHIN | 1787-1791 | - | 3 |
| 5. | COIFFIER | 1811 | 1 | - |
| 6. | COLAS | 1689-1866 | 2 | - |
| 7. | COLET | 1781 | - | 1 |
| 8. | COLINET | 1885 | 1 | - |
| 9. | COLLEMAR | 1651 | - | 1 |
| 10. | COLLET | 1759 | 1 | - |
| 11. | COLLIN | 1605 | - | 1 |
| 12. | COLLO | 1720 | 1 | - |
| 13. | COLMARE | 1622 | 1 | - |
| 14. | COQUARD | 1655 | - | 1 |
| 15. | COQUEREL | 1893 | - | 1 |
| 16. | CORGE? | 1631 | - | 1 |
| 17. | COSSONET | 1649 | - | 1 |
| 18. | COSSONNET | 1764-1846 | 3 | - |
| 19. | COSTEAU | 1599-1881 | 18 | 20 |
| 20. | COUDARD | 1872 | - | 1 |
| 21. | COURAN | 1683 | - | 1 |
| 22. | COURIGOU | 1767-1808 | 5 | - |
| 23. | COURIGOUST | 1667 | 1 | - |
| 24. | COURTEL | 1900 | 1 | - |
| 25. | COURTOIS | 1683-1796 | 1 | 1 |
| 26. | COURTOYS | 1606 | - | 1 |
| 27. | COUTEAU | 1649 | 1 | - |
| 28. | COUVERCELLE | 1825-1866 | 1 | 2 |
| 29. | COUVRAY | 1753 | - | 1 |
