Commune/Paroisse : LANSAC [Gironde] 
| Patronymes | Périodes | Intervenant 1 | Intervenant 2 | |
|---|---|---|---|---|
| 1. | FARFIER | 1889 | - | 1 |
| 2. | FARRIEUL | 1854 | 1 | - |
| 3. | FAURE | 1751-1864 | 3 | 3 |
| 4. | FAVEREAU | 1776-1912 | 3 | 2 |
| 5. | FAVERIE | 1730-1856 | 4 | 1 |
| 6. | FAVRE | 1811 | 1 | - |
| 7. | FAYOUT | 1922 | - | 1 |
| 8. | FEDON | 1906 | - | 1 |
| 9. | FELLONNEAU | 1895 | 1 | - |
| 10. | FERAL | 1919 | 1 | - |
| 11. | FERCHAUD | 1753-1927 | 1 | 2 |
| 12. | FERRIER | 1896-1924 | 2 | - |
| 13. | FEYTY | 1924 | 1 | - |
| 14. | FLEURENCAU | 1737 | - | 1 |
| 15. | FLOBERT | 1896 | - | 1 |
| 16. | FLORANCEAU | 1740 | - | 1 |
| 17. | FLORENCEAU | 1761-1791 | 1 | 2 |
| 18. | FONCEGRIVE | 1738 | - | 1 |
| 19. | FONGEGRIVE | 1727 | - | 1 |
| 20. | FONTENEAU | 1754-1818 | 2 | 4 |
| 21. | FOREAU | 1732-1735 | - | 2 |
| 22. | FORRET | 1823 | 1 | - |
| 23. | FORTON | 1809-1921 | 6 | 6 |
| 24. | FOUQUET | 1816 | 1 | - |
| 25. | FRENAUD | 1840 | - | 1 |
| 26. | FRENEAU | 1835-1925 | 3 | 3 |
| 27. | FROMENTIN | 1728 | - | 1 |
| 28. | FURET | 1813-1835 | 1 | 1 |
| 29. | FUTEE | 1812 | 1 | - |