Commune/Paroisse : Biras [Dordogne] 
| Patronymes | Périodes | Intervenant 1 | Intervenant 2 | |
|---|---|---|---|---|
| 1. | SAGUL | 1895 | 1 | - |
| 2. | SAUNIER | 1841-1882 | 2 | 1 |
| 3. | SAUSSAVIT | 1794 | - | 1 |
| 4. | SAUTARD | 1794 | - | 1 |
| 5. | SAUTY | 1888-1891 | 1 | 1 |
| 6. | SAUVINE | 1878 | 1 | - |
| 7. | SAVY | 1844 | - | 1 |
| 8. | SEBASTIEN | 1889 | 1 | - |
| 9. | SEIGNIER | 1842 | - | 1 |
| 10. | SENOIRE | 1794 | - | 1 |
| 11. | SEQUIER | 1814 | 1 | - |
| 12. | SERIGEOL | 1829 | 1 | - |
| 13. | SEZDAT | 1860 | 1 | - |
| 14. | SICAL | 1797 | - | 1 |
| 15. | SICARD | 1813 | - | 1 |
| 16. | SICOT | 1795 | 1 | - |
| 17. | SILVAIN | 1865 | - | 1 |
| 18. | SIMEON | 1889 | - | 1 |
| 19. | SIMON | 1813-1851 | 2 | 2 |
| 20. | SIMONET | 1836 | - | 1 |
| 21. | SIQUIER | 1826-1846 | - | 4 |
| 22. | SIQUIERE | 1799 | 1 | - |
| 23. | SOLVE | 1830-1844 | 1 | 1 |
| 24. | SOLVEN | 1839 | 1 | - |
| 25. | SORBES | 1880 | - | 1 |
| 26. | SOUILLER | 1847 | - | 1 |
| 27. | SOULIER | 1836 | - | 1 |
| 28. | SOULLIER | 1834 | 1 | - |
| 29. | St AUBIN | 1863 | 1 | - |
| 30. | SUBRENAT | 1814-1867 | 3 | 3 |
| 31. | SUDRAUT | 1866 | - | 1 |
| 32. | SUDREAUD | 1797-1837 | - | 4 |
| 33. | SUDRET | 1861-1895 | 2 | 5 |
| 34. | SUGNET | 1850 | - | 1 |