Naissances / baptêmes
Commune/Paroisse : Decazeville 
| Patronymes | Périodes | Actes | |
|---|---|---|---|
| 1. | SICARD | 1847-1878 | 3 |
| 2. | SICRE | 1872 | 1 |
| 3. | SIGAL | 1856 | 1 |
| 4. | SIGNE | 1843 | 1 |
| 5. | SIGNON | 1837 | 1 |
| 6. | SILVEM | 1895 | 1 |
| 7. | SIMON | 1854-1898 | 9 |
| 8. | SIMONIN | 1845-1847 | 2 |
| 9. | SINBLARD | 1888 | 1 |
| 10. | SINGLAN | 1883-1897 | 6 |
| 11. | SINGLAND | 1880-1897 | 2 |
| 12. | SINGLANDES | 1877-1894 | 6 |
| 13. | SINGLAR | 1865 | 1 |
| 14. | SINGLARD | 1882-1896 | 3 |
| 15. | SINIZERGUE | 1898 | 1 |
| 16. | SINIZERGUES | 1891 | 1 |
| 17. | SIREY | 1898 | 1 |
| 18. | SIRIEYS | 1879 | 1 |
| 19. | SIRIEYSSOL | 1873 | 1 |
| 20. | SIRMEN | 1858-1860 | 2 |
| 21. | SIRVIN | 1890 | 1 |