Commune/Paroisse : Brens [Haute-Savoie] 
| Patronymes | Périodes | Intervenant 1 | Intervenant 2 | |
|---|---|---|---|---|
| 1. | FABERTAZ | 1618 | - | 1 |
| 2. | FALQUET | 1813-1840 | - | 2 |
| 3. | FAUSSERIER | 1874 | 1 | - |
| 4. | FAVRAT | 1820-1927 | 3 | 1 |
| 5. | FAVRE | 1812-1917 | 2 | 1 |
| 6. | FILLION | 1765-1875 | 4 | 2 |
| 7. | FILLON | 1900 | 1 | - |
| 8. | FLEURET | 1708 | - | 1 |
| 9. | FOEX | 1820-1824 | - | 2 |
| 10. | FOL | 1917 | - | 1 |
| 11. | FONTANEL | 1684 | - | 1 |
| 12. | FOREST | 1672 | - | 1 |
| 13. | FORESTIER | 1804-1813 | - | 2 |
| 14. | FOSSORIER | 1857 | 1 | - |
| 15. | FREZIER | 1804 | - | 1 |
| 16. | FROSSARD | 1835-1899 | 2 | 1 |