Commune/Paroisse : Passy [Haute-Savoie] 
| Patronymes | Périodes | Intervenant 1 | Intervenant 2 | |
|---|---|---|---|---|
| 1. | DUC | 1675-1903 | 2 | 1 |
| 2. | DUCA | 1884 | 1 | - |
| 3. | DUCLOZ | 1773 | - | 1 |
| 4. | DUCOUDRAY | 1675-1898 | 16 | 5 |
| 5. | DUCOUDREY | 1618-1860 | 6 | 4 |
| 6. | DUCOUDREY LONG | 1674 | 1 | - |
| 7. | DUCQUIT | 1715 | - | 1 |
| 8. | DUCREY | 1735-1886 | 5 | 8 |
| 9. | DUCROS | 1745 | - | 1 |
| 10. | DUCROST | 1624-1804 | 1 | 3 |
| 11. | DUCROT | 1626-1868 | 27 | 26 |
| 12. | DUCROT COMBET | 1680 | 1 | - |
| 13. | DUCROT COMBETAZ | 1672 | - | 1 |
| 14. | DUCROT CROTACHON | 1665 | - | 1 |
| 15. | DUCROT GERARD | 1669 | - | 1 |
| 16. | DUCROZ | 1626-1905 | 20 | 23 |
| 17. | DUCRUY | 1743 | - | 1 |
| 18. | DUCRUZ | 1823 | 1 | - |